DNA helix

Human Skeleton (loopable)

Blood Flow

Skeleton Presentation 1

Hilary Duff at the Allure's Most Alluring Bodies to Kick Off Skin Cancer Awareness Month at Skylight Studios in New York, New York on May 7, 2008. (Footage by WireImage Video/Getty Images)

Linda Wells and Rachel Zoe at the Allure's Most Alluring Bodies to Kick Off Skin Cancer Awareness Month at Skylight Studios in New York, New York on May 7, 2008. (Footage by WireImage Video/Getty Images)

EVENT CAPSULE: Self Magazine Presents Rock Bodies, New York, NY 6/18/08 (Footage by WireImage Video/GettyImages)

Keri Hilson at the Allure's Most Alluring Bodies to Kick Off Skin Cancer Awareness Month at Skylight Studios in New York, New York on May 7, 2008. (Footage by WireImage Video/Getty Images)

Large colony of Spaghetti Garden Eels (Gorgasia maculata) feeding from burrows, Meemu Atoll, The Maldives

(EXCLUSIVE) SPRINGFIELD, VA - OCTOBER 23: Super swimmer Jess Rogers is making a big splash in the world of swimming - as she battles to qualify for the London 2012 paralympic games next year. The 14-year-old, from Springfield, VA,...

CU Pan right from tail to head of Zebra tail lizard, USA

T/L - Kestrel decomposing

WS driver side profile of Smart Car body display with side airbag / WS Smart safety video; display looks like a giant iPod Touch / WS passenbger side profile of Smart Car body display 2011 Smart Car safety display montage at Cobo Hall on...

/ Surgery room - nurses cover patient upper body in prep for surgery / CU of surgeon looking at patient / Surgeon with nurses at his side begins surgery on January 01, 1955 (Footage by Getty Images)

Boiling duck in the hot pot.