Reuters: Lurking among rocks on the Antarctic Peninsula, the most aggressive land predator on the frozen continent is on the prowl — for microscopic prey. Animals such as lions, crocodiles or snakes thrive elsewhere on the planet, but Antarctica’s most fearsome land predator is a reddish bug. The continent is best known for penguins, seals and whales, but all rely on the sea for food, unlike its Lilliputian land-based creatures and plants — so far almost unaffected by …