King crabs advance over the sea floor, leaving a bleak landscape behind; they came from the Pacific but now they've moved into the Atlantic, and scientists don't know what the enormous crabs' limits might be -- and they're very worried.

Europe's legendary pine forests are under siege; an enemy is marching ruthlessly forward, determined to destroy every tree in its path; the pine processionary caterpillar is a beast that devours pine forests with military precision.