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Earth science and climate
The shape of life

The ancient Earth was profoundly alien. How do we distinguish between the living and non-living in the fossil record?

Sophia Roosth

Deep time
A tyrannosaur of one’s own

Dinosaur collecting isn’t just for museums any more – film stars and sheikhs do it too. What drives a man to covet big bones?

Laurie Gwen Shapiro

Once and future cats

Sabercats were magnificent, powerful predators – what does their extinction tell us about the future of life on Earth?

Brian Switek