Vet's plea after putting down 5 dogs in one day

A vet has issued an urgent, heartfelt plea to owners after having to put down five completely healthy dogs in one day.

300 migratory birds killed after hitting NYC World Trade Center

Almost 300 birds died and 30 were injured in less than 24 hours after hitting the World Trade Center's glass towers in New York City. 

The battle to save world's largest tree

The largest tree in the world - a 275-foot General Sherman - was among a grove of ancient sequoias wrapped in fire-proof blanks Thursday to spare them from blazes tearing through the Western U.S. 

Dolphin spotted playing with swimmers is killed by boat

A dolphin which went viral on social media playing and jumping around a group of swimmers in Cornwall last month has died after being struck by a boat.