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4 articles from Guardian Unlimited Science

If you want to get things done, pause

Taking time out is crucial. Don’t fill up your whole day and you can kickstart a new sense of rhythmMachines work well at a constant speed – and the faster the better. They are designed and built for it. Whether they are spinning cotton or crunching numbers, regular, repetitive actions are what they excel at. Increasingly, our world is designed by machines, for machines. Digital technology...

The greatest threat to life on Earth may come from space

Asteroids and space debris could wreak untold devastation on the planetNext year, Nasa will launch what all involved hope will be the most impactful space mission to date. The Double Asteroid Redirection Test (Dart) is designed to smash headlong into its target. It’s an attempt to deflect an asteroid as a test of what to do if we spot a similar space rock on a collision course with our...

Country diary: King Alfred's to blame for supper getting burnt

Joan’s Hole, Stourport-on-Severn, Worcestershire: An extended campfire yarn unfurls around some unusual-looking fungi Fruit has just started falling in the damson orchard. We can’t help squashing those that lie on the narrow paths to the rusting shepherd’s hut that’s home for a few days. There’s no phone signal, no wifi, and we’ve eschewed the camp stove in favour of the outdoor...

Space wars: Trump's ready for his next big fight – in orbit

New space command reveals fears over vulnerability of superpowers’ satellitesDonald Trump’s declaration that space represents “the next warfighting domain” comes at a time when nervous superpowers are taking an idea that once belonged to the realms of fiction increasingly seriously.US military briefings leading to Trump’s formal announcement of a new, separate space command argued that...