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From tiger scat to DNA to — hopefully — survival

Researchers dig out the elusive cats’ genetic material where they can, to guide efforts at conservation and diversity

Cell meets robot in hybrid microbots

Researchers are developing microbe-propelled tiny bots to deliver drugs, target cancer or do other work in the body

Going gentle

A sociologist explains how to get the most out of the final months of life

Total recall: A brilliant memory helps chickadees survive

In winter, the birds must remember where they’ve hidden tens of thousands of seeds. Biologist Vladimir Pravosudov explains what this can teach us about how the brain evolves.

On whose green Earth?

Are we supposed to take care of the planet or should it take care of us? Willis Jenkins explains how religion shapes the conflicting views over climate change and other environmental issues.

The brain, the criminal and the courts

States of mind that the legal system cares about — memory, responsibility and mental maturity — have long been difficult to describe objectively, but neuroscientists are starting to detect patterns. Coming soon to a courtroom near you?

Getting “exhausted” T cells back into action against cancer

When a malignancy or chronic infection sets in, a kind of immune combat fatigue can follow. Finding ways to recharge immune cells can restore their ability to fight deadly diseases, says immunologist John Wherry.

The life and breath of galaxies

Scientists track gas through time and space to better understand how conglomerations of stars are born and die

Analytics wind up for a shot in ice hockey

Moneyball-like statistical tools have already changed baseball, basketball and football. But bringing such methods to the ice has proved challenging. That might soon be changing.