How fingerprints form was a mystery — until now

Scientists have finally figured out how those arches, loops and whorls formed on your fingertips. While in the womb, fingerprint-defining ridges expand outward in waves starting from three different points on each fingertip. The raised skin arises in a striped pattern thanks to interactions between three molecules that follow what’s known as a Turing pattern, […]

Too much of this bacteria in the nose may worsen allergy symptoms

A type of bacteria that’s overabundant in the nasal passages of people with hay fever may worsen symptoms. Targeting that bacteria may provide a way to rein in ever-running noses. Hay fever occurs when allergens, such as pollen or mold, trigger an inflammatory reaction in the nasal passages, leading to itchiness, sneezing and overflowing mucus. […]

Space rocks may have bounced off baby Earth, but slammed into Venus

Squabbling sibling planets may have hurled space rocks when they were young. Simulations suggest that space rocks the size of baby planets struck both the newborn Earth and Venus, but many of the rocks that only grazed Earth went on to hit — and stick — to Venus. That difference in early impacts could help […]

Satellite swarms may outshine the night sky’s natural constellations

Fleets of private satellites orbiting Earth will be visible to the naked eye in the next few years, sometimes all night long. Companies like SpaceX and Amazon have launched hundreds of satellites into low orbits since 2019, with plans to launch thousands more in the works — a trend that’s alarming astronomers. The goal of […]

NASA’s Perseverance rover snagged its first Martian rock samples

The Perseverance rover has captured its first two slices of Mars. NASA’s latest Mars rover drilled into a flat rock nicknamed Rochette on September 1 and filled a roughly finger-sized tube with stone. The sample is the first ever destined to be sent back to Earth for further study. On September 7, the rover snagged […]

Astronomers may have seen a star gulp down a black hole and explode

For the first time, astronomers have captured solid evidence of a rare double cosmic cannibalism — a star swallowing a compact object such as a black hole or neutron star. In turn, that object gobbled the star’s core, causing it to explode and leave behind only a black hole. The first hints of the gruesome […]