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Physics3807 articles archived since 1845

Watch Velvet Worms Fire Their Slime Cannons

These deceptively cute purple worms are in fact fearsome predators, launching a net of sticky slime from tiny hoses to capture prey. Scientists are using high-speed cameras to understand how the fluid forces the worm's flexible tubes to oscillate and spray the goo over unlucky insects.   "Lens of Time: Velvet Worms—Secret of the Slime” was first published on bioGraphic © 2016, California Academy of Sciences.

21 hours ago — bioGraphic

Frog Spit Behaves Like Bug-Catching Ketchup

The amphibians' saliva is what's known as a "shear-thinning fluid," like ketchup—sometimes thick, sometimes thin and flowing. Christopher Intagliata reports.

February 6, 2017 — Christopher Intagliata

Knot Not Easy to Knot

Chemists have synthesized the most complex molecular knot ever, using a strand just 192 atoms long. The advance could lead to new tougher materials. Christopher Intagliata reports.

January 18, 2017 — Christopher Intagliata