The hottest engine ever created is, by some definitions, not an engine and not particularly hot. But it reveals the weird physics of extreme temperatures at the microscale. The engine is made of a ...

The peculiar Cambrian object known as Brooksella, studied for more than a century, may never have been a fossil at all. New research suggests it could simply be a very unusual rock formed by natural ...

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New images captured by NASA, which have not yet been released yet, show the changing tail of 3I/Atlas. The comet is currently hidden behind the sun and will not be seen by Earth-based telescopes. NBC ...