Today, on April 26th 1986 the world was witness to the worst nuclear disaster to date when reactor number 4 in Chernobyl exploded and sent out a radioactive cloud over the Ukraine, Belarus, Russia and other parts of Europe. TotallyCoolPix already posted impressive Chernobyl 25 Years Later photo galleries by Alexander Kamenski and David Schindler. This gallery shows you the then and now and the bits in between.

Chernobyl Then and Now

View of the Chernobyl nuclear power plant's fourth reactor in this May 1986 file photo. Engineers at Chernobyl nuclear power station shut down its last working reactor a day earlier than planned Thursday, in an impromptu attempt to impress visiting Ukrainian President Leonid Kuchma. But officials said the plant, site of the world's worst nuclear disaster in 1986, would be restarted, so as not to spoil a televised button-pushing ceremony planned for Friday when the power station is finally put to rest. Chernobyl's Number Four reactor caught fire and exploded in April 1986, sending a radioactive cloud of dust over Ukraine, Belarus, Russia and other parts of Europe. REUTERS/Vladimir Repik

Chernobyl Then and Now

An aerial view of the Chernobyl nuclear power plant shortly after the explosion of its still smoking fourth reactor is seen in this 1986 file picture. Ukraine marks the 20th anniversary of the Chernobyl nuclear accident, the world's worst civil nuclear disaster, on April 26 this year. The concrete was used for the building of a sarcophagus around the shattered reactor, designed to contain emanating radiation.

Chernobyl Then and Now

Aerial view of the Chernobyl Nuclear Power Plant in Ukraine May 9, 1986. The arrow shows the spot of the accident which happened on April 26 killing 4 people according to Soviet sources.

Chernobyl Then and Now

A technician monitors nuclear reactor number 3 in a control room of the Chernobyl power plant in this May 12, 1988 file photo. Staff from Ukraine's Chernobyl nuclear power station on duty when the plant's fourth reactor exploded 20 years ago honoured on April 21, 2006 colleagues who died in the aftermath and recalled how the disaster shattered their lives. A series of explosions destroyed reactor No. 4 station and several hundred staff and firefighters were thrown into the task of tackling a blaze that burned for 10 days, sending a plume of radiation around the world in the world's worst civil nuclear disaster.

Chernobyl Then and Now

A helicopter sprays a decontaminating substance over the region surrounding the Chernobyl nuclear power station June 13, 1986. Reuters/Tass JAPAN OUT

Chernobyl Then and Now

-FILE PHOTO 013JUN86-A traffic policeman checks vehicles entering the restricted zone surrounding the Chernobyl nuclear station in Ukraine in this June 13, 1986 file photo. Staff from Ukraine's Chernobyl nuclear power station on duty when the plant's fourth reactor exploded 20 years ago honoured colleagues who died in the aftermath and recalled how the disaster shattered their lives. A series of explosions destroyed reactor No. 4 station and several hundred staff and firefighters were thrown into the task of tackling a blaze that burned for 10 days, sending a plume of radiation around the world in the world's worst civil nuclear disaster.

Chernobyl Then and Now

A Ukrainian policeman decontaminates a bus used to carry workers who built a sarcophagus around the fourth reactor of the Chernobyl nuclear station after its explosion in this 1986 file picture. Ukraine marks the 20th anniversary of the explosion of the Chernobyl nuclear accident, world's worst civil nuclear disaster, on April 26, 2006. REUTERS/Vladimir Repik/Files

Chernobyl Then and Now

Alexander Kovalenko, Information Chief of the Chernobyl clean up, holds a radiation meter showing a level of 2.3 milliRoentgens (hundreds of thousands of times less than in the first day after the accident). In the background are the third and the adjoining damaged fourth reactor now entombed in concrete. REUTERS/Meg Bortin

Chernobyl Then and Now

A combination of images, taken in 1982 and on March 31, 2011 (bottom), shows the before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on February 24, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on March 31, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on March 31, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on March 31, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on March 31, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

A combination of images, taken in 1982 and on April 7, 2011, shows before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich

Chernobyl Then and Now

Local resident Ganna Zavorotnya, 78, (L) collects vegetables in a field, as a Greenpeace expert measures radiation levels, in the village of the Kupovate in the 30 km zone around the Chernobyl nuclear power plant, April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month’s earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

A view of the abandoned city of Prypiat, near the Chernobyl nuclear power plant March 31, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich

Chernobyl Then and Now

A view of a monument to liquidators (R, front), emergency workers who fought the blaze at the Chernobyl nuclear reactor, with a sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant in the background March 31, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich

Chernobyl Then and Now

A view of a monument to liquidators, emergency workers who fought the blaze at the Chernobyl nuclear reactor, with a reflection of sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant March 31, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich

Chernobyl Then and Now

A child's gas mask and a shoe are seen at a kindergarten in the abandoned city of Prypiat near the Chernobyl nuclear power plant, April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month’s earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

Local resident Ganna Zavorotnya, 78, poses in Kupovate in the 30 km zone around the Chernobyl nuclear power plant April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month’s earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

Local resident Ganna Zavorotnya, 78, walks along a road in the village of the Kupovate in the 30 km zone around the Chernobyl nuclear power plant, April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month’s earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

The interior of a kindergarten is seen in the abandoned city of Prypiat near the Chernobyl nuclear power plant April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month's earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

Toys are seen scattered on the floor inside a kindergarten in the abandoned city of Prypiat near the Chernobyl nuclear power plant April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month's earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

The sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant is seen in the horizon from the balcony of a building in the abandoned city of Prypiat April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month's earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

An empty swimming pool is seen in the abandoned city of Prypiat near the Chernobyl nuclear power plant April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month's earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

Local resident Ivan Ilchenko, 76, walks in a field in the village of the Kupovate in the 30 km zone around the Chernobyl nuclear power plant, April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month's earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich

Chernobyl Then and Now

A photo album and a gas mask are seen inside a kindergarten in the ghost town of Pripyat near the Chernobyl nuclear power plant, in this April 13, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

A child gas mask and a doll are seen inside a kindergarten in the abandoned city of Prypiat near the Chernobyl nuclear power plant in this April 4, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

Makar Krosovski visits his abandoned and ruined house, which he left shortly after the Chernobyl blast, in the state radiation ecology reserve within the 30 km (18 miles) exclusion zone around the Chernobyl nuclear reactor in the village of Pogonnoe in this February 21, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Vasily Fedosenko/Files (BELARUS - Tags: ENVIRONMENT DISASTER ENERGY ANNIVERSARY HEALTH POLITICS)

Chernobyl Then and Now

A view of the control centre of the damaged fourth reactor at the Chernobyl nuclear power plant in this February 24, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

The sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant is seen behind a building decorated with graffiti in the abandoned city of Prypiat in this April 4, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

Graffiti is seen inside a building in the abandoned city of Prypiat, near the Chernobyl nuclear power plant March 31, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich

Chernobyl Then and Now

General view of the sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant in this April 26, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

Contaminated helicopters and machinery that were used to fight the fire at the Chernobyl nuclear plant rust in Rossoha inside the 30-km exclusion zone set around the plant in this April 21, 2001 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Files

Chernobyl Then and Now

An engineer uses a telephone inside a control centre of the number one reactor at the Chernobyl power station, in this April 13, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

A worker checks radiation levels inside the first block of the Chernobyl nuclear power station in this March 1996 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Files

Chernobyl Then and Now

A group of women watch their burning houses in the abandoned village of Tovsty Lis near the Chernobyl nuclear power plant in this April 23, 1996 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Files

Chernobyl Then and Now

A man pushes a bicycle with a sack of flour in the village of Dvorishche, near the 30-km (18-mile) zone around the Chernobyl nuclear reactor, in this April 6, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Files

Chernobyl Then and Now

Women gather around a truck to receive food from Ukraine's Emergencies Ministry in Ilintsy, a village within the 30-km exclusion zone around the closed Chernobyl nuclear power plant, in this December 16, 2005 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Files

Chernobyl Then and Now

Women hold portraits of emergency workers who fought the blaze at the Chernobyl nuclear reactor, during a commemoration ceremony in Kiev in this December 14, 2007 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Konstantin Chernichkin/Files

Chernobyl Then and Now

A visitor walks in front of the damaged fourth reactor at the Chernobyl nuclear power plant in this February 24, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Gleb Garanich/Files

Chernobyl Then and Now

A guard walks through the entrance to the state radiation ecology reserve in the 30 km (18 miles) exclusion zone around the Chernobyl nuclear reactor near the village of Babchin in this February 21, 2011 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Vasily Fedosenko/Files

Chernobyl Then and Now

Ukrainian teenage girls Irina and Inna, victims of the radiation fallout from the 1986 power plant explosion in Chernobyl, receive treatment for psoriasis at the Paediatric Hospital in Tarara in this April 26, 2005 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Claudia Daut/Files

Chernobyl Then and Now

Ukrainian boy Bagdan, a victim of radiation fallout from the 1986 power plant explosion in Chernobyl, jokes while surrounded by friends at the Paediatric Hospital in Tarara in this April 5, 2005 file photo. Bagdan suffers from alopecia and is one of the 18,000 Ukrainian children, Cuba has treated since 1990 free of charge for loss of hair, skin disorders, cancer, leukaemia and other illnesses attributed to the radioactivity unleashed by the reactor meltdown years before they were born. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Claudia Daut/Files

Chernobyl Then and Now

A cancer patient leans against the window of a special treatment chamber in a hospital in Donetsk in this April 25, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Alexander Khudotioply/Files

Chernobyl Then and Now

A boy is screened for thyroid cancer by doctors from the Red Cross in the village of Ukrainka, some 100km west of Kiev, April 19, 2011. The world community, spurred by the nuclear crisis in Japan, on Tuesday pledged 550 million euros ($787 million) extra cash to help build a new containment shell at the site of the 1986 Chernobyl accident. REUTERS/Gleb Garanich

Chernobyl Then and Now

Workers walk in front of the fourth reactor at the Chernobyl nuclear power plant in this March 31, 2006 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Damir Sagolj/Files

Chernobyl Then and Now

Local resident Anastasiya Chekalovets, 86, stands in a cemetery near the village of Kapachy, in the 30 km zone around the Chernobyl nuclear power plant, April 15, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich

Chernobyl Then and Now

A water tanker sprays water on the road to prevent radioactive dust from being blown away in front of the ruined reactor at Chernobyl April 19, 2011. The world community, spurred by the nuclear crisis in Japan, on Tuesday pledged 550 million euros (483 million pounds) extra cash to help build a new containment shell at the site of the 1986 Chernobyl accident. REUTERS/Gleb Garanich

Chernobyl Then and Now

A bus carrying workers leaves in front of the ruined reactor at Chernobyl April 19, 2011. The world community, spurred by the nuclear crisis in Japan, on Tuesday pledged 550 million euros (483 million pounds) extra cash to help build a new containment shell at the site of the 1986 Chernobyl accident. REUTERS/Gleb Garanich

Chernobyl Then and Now

Workers on a bus look out of the window as they pass the Chernobyl nuclear power plant in Ukraine April 26, 2011. Belarus, Ukraine and Russia mark the 25th anniversary of the Chernobyl disaster, the world's worst civil nuclear accident, on Tuesday. REUTERS/Gleb Garanich

Chernobyl Then and Now

Orthodox Patriarch of Moscow and All Russia Kirill (3rd L) and Ukrainian Prime Minister Mykola Azarov (4th L) attend a memorial service for Chernobyl victims in Kiev April 26, 2011. Belarus, Ukraine and Russia mark the 25th anniversary of the Chernobyl disaster, the world's worst civil nuclear accident, on Tuesday. REUTERS/Konstantin Chernichkin

Chernobyl Then and Now

A woman lights a candle at a memorial dedicated to fire fighters who died from the Chernobyl nuclear disaster, during a night service near the plant in the city of Slavutych, in this April 26, 2010 file photo. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26, 1986. REUTERS/Konstantin Chernichkin/Files

Chernobyl Then and Now

A boy lights a candle at a memorial dedicated to firefighters and workers who died after the Chernobyl nuclear disaster during a night service near the Chernobyl plant in the city of Slavutych April 25, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the Chernobyl disaster, the world's worst civil nuclear accident. REUTERS/Gleb Garanich