Weirdest science news of the week

April 3, 2015 9:55 PM

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Weirdest science news of the week

Spiders have developed a unique way to move around: Rather than relying mainly on muscles to move, they use a fluid called hemolymph, which is their blood. When hemolymph flows into their tubelike legs, the limbs extend and their flexor muscles bend the legs at the joint, causing that fluid to flow back out.

Temperature can change the thickness, or viscosity, of hemolymph, said the senior author of a new study, Anna Ahn, an associate professor of biology at Harvey Mudd College in California.

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