California blackworms can squeeze through narrow channels faster than they can wriggle across wide ones, a finding that may help with robot design.

Scientists are investigating what the various sounds mean — and discovering that the creatures may be more like birds and mammals than once thought

Thamires Lima, a research professor in chemical engineering at Drexel University, studies the properties of thick, viscous liquids — think honey or molasses, though in a lab you’re more likely to find polypropylene or crude oil. Using a method called extensional rheology, Lima stretches liquids between metal plates to find the force that makes them flow. A few years ago, she was conducting a…

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