Using an ultra-powerful laser, researchers have successfully characterised liquid carbon in the lab for the first time. The experiments offer rare insight into one of the most abundant elements in the universe, which, despite its ubiquity, remains the least understood in its liquid form among stable elements.

Late in 2023, a video shared on Reddit that captured a passenger plane flying over San Francisco went viral because it appeared to be levitating mid-air. While some fighter jets can hover in place, there aren't any commercial planes with the technology to do so. What you see in the video is an optical illusion that has more to do with the concept of reference points and motion than any secret hover mode.

Up to now, humans have only been able to observe four dimensions in the universe – height, length, width and time. But beyond these dimensions, collectively known as 'spacetime', there may be more that we cannot perceive – including the fabled fifth dimension.

Two astronauts, Butch Wilmore and Suni Williams, are being closely monitored by flight surgeons after spending nine months in space.

The explosion of SpaceX's rocket Thursday night has sparked fears that NASA's stranded astronauts could be stuck in space for even longer, or worse. SpaceX has been tasked with finally bringing Sunita Williams and Barry Wilmore home from the International Space Station (ISS) later this month.

It’s hard not to love the idea of escaping frigid weather and heading somewhere warm, maybe even tropical. That’s the stuff daydreams are made of. But the idea of flying in that weather? That’s less appealing—and maybe even concerning if you’re flying out in a snowstorm or subzero temperatures. Aside from stressing about delays and even cancellations, you might also be worried about flight safety and wonder, What temperature is too cold for planes to fly?