Some penguin populations, however, are under serious threat because of climate change. Losing them and their guano could mean ...

The researchers further demonstrated that the ammonia kicks off an atmospheric chain reaction. Out at sea, tiny plantlike ...

It's good to be home. Now we need to end the illegal abduction of Kilmar Arbego Garcia and bring him home too. We're joined by his wife Jennifer, by his mother Cecilia, by his brother Caesar and ...