After swimming across chilly waters to Whidbey Island in Washington State, the solitary elk charmed residents for more than a decade with his antics. He died at 15 to 18 years old.

Cephalopods are masters of camouflage. Scientists want to decipher how the process works in the brain.

Bogong moths have been in decline since the 1980s, but this spring the insects have been sighted in the thousands across southeastern Australia, delighting scientists.