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Sunday, January 20, 2019

These dying stars have erratic ‘heartbeats’

Astronomers using the planet-hunting spacecraft Kepler have discovered a dying star with irregular pulsations that cause the star to get a few percent brighter and fainter every few minutes. They also observed massive outbursts every...

New sunscreen won’t seep into the skin

A new sunscreen doesn’t penetrate the skin, which could eliminate the health concerns associated with its commercial alternatives. Most commercial sunblocks are good at preventing sunburn, but they can go below the skin’s surface and...

A witness to a wet early Mars

Vast volumes of water once flooded through this deep chasm on Mars that connects the ‘Grand Canyon’ of the Solar System – Valles Marineris – to the planet’s northern lowlands. The image, taken by ESA’s...

How Zika moves from mother to infect fetus

Scientists say they have a clearer picture of how Zika virus infects a developing fetus, migrating from the mother’s bloodstream into the placenta, where it multiplies and then spreads to the brain of a fetus. The models, based...

This cheap test diagnoses Zika in hours

Researchers built and tested a new Zika diagnostic test in about six weeks. The simple and inexpensive test uses RNA sensors embedded in discs of paper that turn from yellow to purple in the...

Egyptian blue hides in these mummy portraits

Dusting off 15 Roman-era Egyptian mummy portraits—mostly untouched for 100 years—has revealed a 2,000-year-old surprise.Researchers discovered that the ancient artists used the pigment Egyptian blue as material for underdrawings and for modulating color—a finding never...

Tons of dark matter hide in nearby dwarf galaxy

By measuring the mass of a nearby dwarf galaxy called Triangulum II, researchers may have found the highest concentration of dark matter in any known galaxy. Although they outweigh particles of regular matter by more...

Rosetta’s big day in the Sun

ESA’s Rosetta today witnessed Comet 67P/Churyumov–Gerasimenko making its closest approach to the Sun. The exact moment of perihelion occurred at 02:03 GMT this morning when the comet came within 186 million km of the...

Ancient skull links turtles to birds

New fossil evidence proves that turtles share a recent common ancestor with birds and crocodiles. The discovery may settle a longstanding argument about the origins of turtles, scientists say. At issue is the evolution of...

Guzzling these RNA molecules won’t do any good

A new study may have solved an ongoing debate about the benefits of ingesting microRNA molecules from food or liquid. The molecules appear to suppress cancer cell growth and may play a role in...
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