The US$2.7-billion Perseverance rover collected the samples looking for evidence of past life, but NASA is dithering about how to get them off the Red Planet.

Two studies show that the light emitted by nanocrystals embedded with luminescent ions can be used to sense forces with high spatial resolution — even when those forces are inside a microscopic ...

A new wave of obesity drugs, a multitude of space missions and concern over climate-action policies — we run through what to look out for over the next 12 months.

During pregnancy, several organs are rewired to support the health of the mother and the offspring. A molecular signalling pathway called RANK–RANKL drives the expansion of the layer that lines ...

The cover highlights the mechanically self-organized pattern of scales on the head of a young Nile crocodile (Crocodylus niloticus). Typically, vertebrate skin appendages such as scales, hairs or ...

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We investigate how ancient humans ran and hear from climate scientists who are rising to the challenges of an impending Trump presidency. We hear that a 2020 study promoting hydroxychloroquine for ...

At major computer-science publication venues, up to 17% of the peer reviews are now written by artificial intelligence. We need guidelines before things get out of hand.