Misc: in which year was the chernobyl disaster?

Questions

The domestic cat is the only species able to hold its tail vertically while walking. Wild cats hold their tail horizontally, or tucked between their legs while ----------?

Sharks and rays are the only animals known to man that cannot succumb to cancer. Scientists believe this is related to the fact that they have no bone - only ----------?

There are more than 100 million ----------?

The nematode Caenorhabditis elegans ages the equivalent of 5 human years for every day they live, usually expiring after 14 days. However, when stressed, the ?

The duckbill platypus of Australia can store up to 600 worms in its large cheek ----------?