The intelligence of crows is remarkable, and terrifying if you are a toad.

BERLIN, April 28 -- More than 1,000 toads have puffed up and exploded in a Hamburg pond in recent weeks, and German scientists have no explanation for it. The pond water has been tested, but its ...

A mystery of exploding toads has turned many people into armchair zoologists this week. Amphibians in a previously obscure German pond have reportedly been blowing up in their thousands, leaving a ...