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Articles sur Physics

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Gravity feels like it’s pulling everything toward Earth, but why? AdventurePhoto/E+ via WikimediaCommons

Why does gravity pull us down and not up?

Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
Tour de France riders have to eat constantly to replenish the energy they burn. Filip Bossuyt/Flickr

Tour de France: How many calories will the winner burn?

Riders in the 2021 Tour de France will ride more than 2,100 miles (3,400 km) over the 21 flat and mountainous stages of the race. And they will burn an incredible amount of energy while doing so.
Mysterious blasts of radio waves from across the universe called fast radio bursts are getting more attention from astronomers. ESO/M. Kornmesser

535 new fast radio bursts help answer deep questions about the universe and shed light on these mysterious cosmic events

Fast radio bursts are the focus of a young and fascinating field of astronomy. Researchers just released data on more than 500 new bursts, quadrupling the total number of detected events.
The big wildcard for sea level rise is Antarctica. James Eades/Unsplash

Antarctica is headed for a climate tipping point by 2060, with catastrophic melting if carbon emissions aren’t cut quickly

If emissions continue at their current pace, Antarctica will cross a threshold into runaway sea rise when today’s kids are raising families. Pulling CO2 out of the air later won’t stop the ice loss.
Fire a set of high-power lasers at a tiny speck of hydrogen isotopes and you can initiate nuclear fusion, the process that powers the Sun. National Ignition Facility

How much energy can people create at one time without losing control?

Scientists are working on ways to make lots of energy by converting matter into energy. The trick is keeping the process under control. One possibility is nuclear fusion – the Sun’s power source.
Anything that moves or processes tiny amounts of fluid is a microfluidic device. Chris Neils/Albert Folch

Microfluidics: The tiny, beautiful tech hidden all around you

Electronics are not the only technology to have been miniaturized. Using the strange behavior of fluids in tiny spaces, microfluidic devices are critical to medicine, science and the modern world.
Faster than light travel is the only way humans could ever get to other stars in a reasonable amount of time. Les Bossinas/NASA/Wikimedia Commons

Warp drives: Physicists give chances of faster-than-light space travel a boost

If humanity wants to travel between stars, people are going to need to travel faster than light. New research suggests that it might be possible to build warp drives and beat the galactic speed limit.

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