The Loh Down On Science | 89.3 KPCC
About This Show
The Loh Down on Science is the fun way to get your daily dose of science in less than two minutes. The program explains the world of science with a dash of humor. Hosted by writer/performer and Caltech alumna Sandra Tsing Loh, it's a program for those who love science as well as for those who avoid it!
Most Recent Episode
Sticky and Icky
1 day ago
; Credit: http://www.sciencemag.orgThe Loh Down On ScienceYou’ve got to kiss a lot of frogs to find…a mouthful of spit?This is Sandra Tsing Loh with the Loh Down on Science.Frogs launch their sticky tongue to capture bugs in the blink of an eye. Actually, FIVE TIMES FASTER. Which means the impact is immense! So how does Kermit grab and hold insects after smashing into them? Alexis Noel, a mechanical engineer at Georgia Tech, was curious. She and her team measured the material properties of frog tongues and saliva. They found that frog tongues are ten times softer than human tongues. And their saliva is five times more viscous, or thicker, than ours. Even more surprising? frog saliva is a non-Newtonian fluid! That means that it changes viscosity under stress. The same thing that happens to ketchup when you tap the bottle! When the frog’s tongue hits the bug, the saliva gets thinner. And easily spreads around the insect. As the tongue retracts, the saliva thickens to firmly grip the precious cargo. Noel thinks new adhesives mimicking frog saliva are the way of the future.Frog saliva: maybe that’s why Miss Piggy and Kermit didn’t stick it out.This content is from Southern California Public Radio. View the original story at SCPR.org.