When astronauts return from spacewalks, they often describe unexpected scents similar to burnt steak and spent gunpowder. But why does outer space smell like torched things, and where does this odor come from? To be clear, space is a near-perfect vacuum. While in space, astronauts protect themselves in spacecraft, spacesuits and space stations, “since direct … Read more
High-powered infrared laser weapons could be on the horizon after scientists figured out how to make lasers nine times more powerful. Militaries have already deployed laser-powered weapons, as popularized by films like “Star Wars,”, but they’re much weaker than those seen on screen and can only disable small airborne targets. The light In these current … Read more
Look up at the sky and clouds may look like “feather canyons” and “ice cream castles in the air,” as they did to Joni Mitchell. But why do they look as if they’re suspended in mid-air, and are they actually floating? And if so, what keeps them aloft? “It’s sort of an illusion,” Alex Lamers, … Read more
Nuclear weapons testing in the 1950s and early 1960s left the first obvious and indelible marks of “overwhelming” human activity on Earth, and these events may signal the beginning of a new geological epoch known as the Anthropocene, geologists say. Fallout from these tests snowed down from the atmosphere and became trapped in the earth … Read more
Astronomers have peered back to the dawn of the cosmos to observe time ticking five times more slowly in the early universe than it does now — finally proving a prediction that Albert Einstein made more than a century ago. Researchers spotted the extreme slow-motion effect in data taken from bright cosmic beacons known as … Read more
Neanderthal genes may be one cause of the disorder nicknamed the “Viking disease,” in which fingers become frozen in a bent position, a new study finds. The study, published June 14 in the journal Molecular Biology and Evolution, finds gene variants that were inherited from Neanderthals that dramatically increase the odds of developing the condition, … Read more
Since the first direct detection of the space-time ripples known as gravitational waves was announced in 2016, astronomers regularly listen for the ringing of black holes across the universe. Projects like the Laser Interferometer Gravitational-Wave Observatory (better known as LIGO) have detected almost 100 collisions between black holes (and sometimes neutron stars), which shake up … Read more
Elon Musk’s brain-implant company Neuralink has been given clearance from the U.S. Food and Drug Administration (FDA) to carry out its first trials in humans, according to news reports. Neuralink aims to use its brain-computer interface (BCI) technology to restore movement in people with quadriplegia, meaning complete or partial paralysis of the arms, legs and … Read more
Space is famously considered the “final frontier” — but what part of space are we even talking about? Space, outer space and deep space are used somewhat interchangeably in many contexts, but astronomers have come up with clear distinctions between them. So, what’s the difference between them? The term outer space refers to anything beyond … Read more
The moon’s orbit around Earth appears so regular that civilizations have based the month on lunar motion for thousands of years. However, the moon is actually creeping slowly away from Earth. So will Earth lose its moon at some point? Scientists determined the rate at which the moon is drifting away from Earth with help … Read more
