Chatting with friends and colleagues, it seems like quite a few of us don’t feel like we’re getting enough sleep right now, thanks to the huge disruptions to our lives the pandemic has brought about.

Our growing concern with getting a good night’s sleep has led to a boom in wearable sleep trackers, which estimate how much sleep you actually get by measuring body movements or heart rate during the night. But as Matthew Reid explains, these sleep tracking devices might not always be as accurate as users think — and for some, monitoring technology could actually keep them up at night.

Meanwhile, researchers studying glaciers from the end of the last ice age have been looking back 12,000 years to try to understand how climate change may alter our weather today. And astronomers watching two galaxies merge have shown for the first time that the resulting rapid expulsion of gas may be what stops some galaxies from forming new stars.

Heather Kroeker

Commissioning Editor, Health + Medicine

Sleep trackers use an algorithm to estimate how much time you spent asleep based on body movements. Andrey_Popov/ Shutterstock

Are sleep trackers accurate? Here’s what researchers currently know

Matthew Reid, University of Oxford

Despite the appeal of sleep trackers, they could cause unwanted anxiety for some.

As the jet stream moves northwards, the UK can expect more storms and flooding in the winter. James McDowall/Shutterstock

How mapping the weather 12,000 years ago can help predict future climate change

Brice Rea, University of Aberdeen

Ice Age glaciers can help us track the jet stream 12,000 ago, and by comparing its path today we can see how it's moving northwards, changing weather patterns and indicating climate change.

Elliptical galaxies are filled with extremely old stars. Igor Chekalin/Shutterstock.com

Galaxies eject gas when they merge, preventing new stars forming – new research

Annagrazia Puglisi, Durham University

These results might lead us to revise our understanding of how galaxies stop forming their stars.

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