The cookie cutter shark (Isistius brasiliensis) is as fearless as they come! This small, 20-inch shark can take on giants like whales and larger sharks, and have even been known to mistakenly try to bite submarines. They dwell in the deep warm ocean and come closer to the surface as the sun sets to grab a quick snack off their unsuspecting prey. Cookie cutter sharks approach their victims from below, latch on with their suction cup style lips, bite and then twist (below). A nice, round hole is left as a souvenir. They get this easy meal by tricking other ocean residents with their distinctive brown collar, which may act as a lure that allows the cookie cutter shark to be seen as a smaller, not-so-scary fish. As frightening as they seem, the ...

After being bitten by the lone star tick, people in the US are experiencing severe allergic reactions to red meat - including hives, swelling, trouble breathing and vomiting. So pretty much every meat lover's worst nightmare.

This hefty guy is the giant horned caterpillar of the royal walnut moth (Citheronia regalis) from North America. These caterpillars can grow to a whopping 15 cm (6 inches) long!

When a female kiwi is about to about to lay her egg, it fills almost her entire body cavity. She's usually unable to eat anything in the days before laying.

Meet this 18-day-old embryo of an African night adder. These snakes might be venomous, but they're surprisingly friendly - in captivity they've been known to crawl on people, trying to tuck themselves into their clothes.

The rather impressive flight deck of NASA's Space Shuttle Endeavour, a now-retired orbiter.

After decades of dreaming and preparation, scientists have finally put the Rosetta spacecraft into orbit around a comet. And now the Rosetta is about to land!