The evidence for pair-instability supernovae

A supernova is a stellar explosion. They can occur when a large star exhausts its ability to fuse hydrogen into higher elements, and its core collapses. The resulting rebound rips apart the outer layers of ...

Oct 06, 2014
4.9 / 5 (19) 5

How dinosaur arms turned into bird wings

Although we now appreciate that birds evolved from a branch of the dinosaur family tree, a crucial adaptation for flight has continued to puzzle evolutionary biologists. During the millions of years that elapsed, wrists went ...

Sep 30, 2014
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Superconducting circuits, simplified

Computer chips with superconducting circuits—circuits with zero electrical resistance—would be 50 to 100 times as energy-efficient as today's chips, an attractive trait given the increasing power consumption ...

Oct 17, 2014
4.8 / 5 (19) 3