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Scientists have designed a solar panel-like pacemaker that can precisely control heartbeats. Eugene Mymrin/Moment via Getty Images

Pacemaker powered by light eliminates need for batteries and allows the heart to function more naturally − new research

Researchers designed an ultrathin pacemaker that can be implanted via minimally invasive techniques, potentially improving recovery time and reducing the risk of complications.
Endangered North Atlantic right whale Snow Cone, entangled in fishing rope, with her newborn calf off Georgia in 2021. Georgia Department of Natural Resources/NOAA Permit #21731, via AP

Surviving fishing gear entanglement isn’t enough for endangered right whales – females still don’t breed afterward

Even when female North Atlantic right whales survive entanglement in fishing gear, it may affect their future ability to breed, increasing the pressure on this critically endangered species.
Understanding the flexibility of T cell memory can lead to improved vaccines and immunotherapies. Juan Gaertner/Science Photo Library via Getty Images

Immune cells can adapt to invading pathogens, deciding whether to fight now or prepare for the next battle

When faced with a threat, T cells have the decision-making flexibility to both clear out the pathogen now and ready themselves for a future encounter.
Seabirds like this sooty shearwater can drown when they become tangled in drift nets and other fishing gear. Roy Lowe, USFWS/Flickr

Sharks, turtles and other sea creatures face greater risk from industrial fishing than previously thought − we estimated added pressure from ‘dark’ fishing vessels

The toll on wildlife from illegal fishing, bycatch and entanglement in fishing gear is likely underestimated, because it doesn’t account for ‘dark’ fishing vessels, a new study finds.
Water from the Mackenzie River, seen from a satellite, carries silt and nutrients from land to the Arctic Ocean. Jesse Allen/NASA Earth Observatory

Arctic rivers face big changes with a warming climate, permafrost thaw and an accelerating water cycle − the effects will have global consequences

A new study shows how thawing permafrost and intensifying storms will change how water moves into and through Arctic rivers.

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