COVID-19 creates dire US shortage of teachers, school staff

One desperate California school district is sending flyers home in students' lunchboxes, telling parents it's "now hiring." Elsewhere, principals are filling in as crossing guards, teachers are being offered signing bonuses ...

Cosmic rays may be key to understanding galactic dynamics

Cosmic rays are charged subnuclear particles that move close to the speed of light, constantly raining down on the Earth. These particles are relativistic, as defined by Albert Einstein's special relativity, and manage to ...

The iron jaws of the bristle worm

Bristle worms are found almost everywhere in seawater, they have populated the oceans for hundreds of millions of years. Nevertheless, some of their special features have only now been deciphered: Their jaws are made of remarkably ...

Dry ice, the unsung hero of the COVID-19 vaccine rollout, explained

Robert Levis dumped chunks of a whitish substance into a beaker of water, and immediately the liquid began frothing and churning like a sorcerer's potion, spewing plumes of fog across the table of his office at Temple University.

How insect wings withstand collisions without breaking

About once a second wings of foraging bees collide with small obstacles such as flowers, leaves or branches during flight without suffering major long-term damage. At the same time, they withstand aerodynamic loads effortlessly—yet ...

Generating electricity through flooring surfaces

Ingo Burgert and his team at Empa and ETH Zurich have proven it time and again: Wood is so much more than "just" a building material. Their research aims at extending the existing characteristics of wood in such a way that ...

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