Could these strays save humanity? Scientists are studying canine DNA at the site of the Chernobyl nuclear disaster to understand how life can survive long-term radiation exposure.
The very odd dogs living in nuclear wasteland
Survivors: An estimated 900 dogs live in the Exclusion Zone at Chernobyl. Glossary
Chernobyl - The disaster, in 1986, involved a meltdown at a nuclear plant in Ukraine.
Hiroshima - A Japanese city destroyed by an atomic bomb in World War II.
Nagasaki - A city in Japan that was hit by an atomic bomb during World War Two.
DNA - Deoxyribonucleic acid is the material in an organism that carries genetic information.
Radiation - Energy given off when radioactive material decays. It can be extremely harmful and sometimes fatal, causing vomiting, skin damage, hair loss and cancer.
Sterile - Not able to produce children. Can also mean totally clean.
Inextricably - In a way that is impossible to separate or disentangle.