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Visualizzazione post con etichetta science. Mostra tutti i post
Visualizzazione post con etichetta science. Mostra tutti i post

martedì 29 settembre 2015

Lights at night trick wild wallabies into breeding late

Lights at night trick wild wallabies into breeding late
Artificial lighting at night delays wild tammar wallaby breeding, potentially pushing the nursing marsupial moms out of sync with their peak season for food. Tammar wallabies (Macropus...

‘Protocells’ show ability to reproduce

‘Protocells’ show ability to reproduce
Man-made balls of genetic material and membranes can pull off a decent impression of primitive cells.  These squishy spheres known as “protocells” can accept chemical deliveries...

Some bats chug nectar with conveyor belt tongues

Some bats chug nectar with conveyor belt tongues
A subset of bats that eat off the nectar menu sip from flowers using specialized tongues that pump liquid up to their mouths, researchers report September 25 in Science Advances. Nectar-feeding...

lunedì 28 settembre 2015

Math describes sheep herd fluctuations

Math describes sheep herd fluctuations
View the video There’s something in the way sheep move. In a herd, Merino sheep follow a predictable pattern of spreading out and clustering together. Now scientists have developed...

Salt streaks sign of present-day water flows on Mars

Salt streaks sign of present-day water flows on Mars
Liquid water might not be a distant memory on Mars. New data suggest water flows on the Red Planet even today. Seasonal dark streaks etched onto some slopes are coated with salts that...

67P reveals recipe for a comet

67P reveals recipe for a comet
To make one oddly shaped comet, take two smaller comets and squish them together. That probably explains why comet 67P/Churyumov-Gerasimenko looks like a rubber duck, a new study...

Mysterious circles appear, grow on comet

Mysterious circles appear, grow on comet
A comet is growing its own version of crop circles. Over the course of a month, five expanding disklike depressions appeared on the surface of 67P/Churyumov-Gerasimenko in images...

Life in the polar ocean is surprisingly active in the dark winter

Life in the polar ocean is surprisingly active in the dark winter
Scientists have long thought that in the supercold, perpetually dark, polar winter, life pretty much shuts down. With no sunlight, there’s no photosynthesis, so phytoplankton wouldn’t...

venerdì 25 settembre 2015

83-year-old math problem solved

83-year-old math problem solved
It took more than 80 years, but a problem posed by a mathematician who delighted in concocting tricky ones has finally been solved. UCLA mathematician Terence Tao has produced a solution...

Don't judge a whale's gut microbiome by diet alone

Don't judge a whale's gut microbiome by diet alone
Baleen whales totally skimp on their veggies, feeding on schools of fish and krill, but the whales share gut microbes with both meat eaters and vegetarians, researchers report September...

Ancient hominid ears were tuned to high frequencies

Ancient hominid ears were tuned to high frequencies
South African hominids that lived between around 2.5 million and 1.5 million years ago had an ear for high-frequency consonant sounds, anthropologist Rolf Quam of Binghamton University...

This weekend, lunar eclipse coincides with supermoon

This weekend, lunar eclipse coincides with supermoon
Once in a blue moon, a supermoon turns into a blood moon. During the September 27 total lunar eclipse, the moon will turn a deep crimson when it passes through Earth’s shadow on its...

Alpine bee tongues shorten as climate warms

Alpine bee tongues shorten as climate warms
As climate change has warmed the heights of the Rocky Mountains, the anatomy of some specialized bees has changed too, weakening their ancient partnerships with certain alpine flowers. Two...

giovedì 24 settembre 2015

Elusive acid finally created

Elusive acid finally created
After more than a century of searching, chemists have finally nabbed a legendary acid. The acid called cyanoform or tricyanomethane appears widely in textbooks as one of the strongest...

Black hole collisions evade detection

Black hole collisions evade detection
Supermassive black hole duos are awfully quiet. Searches for spacetime ripples radiating away from these spiraling monsters are coming up empty, a new study reports. The silence is...

What makes cells stop dividing and growing

What makes cells stop dividing and growing
Scientists have discovered a biochemical switch that seals a cell’s fate.  A buildup of the protein GATA4 forces cells to enter a permanently static state known as senescence,...

New dinosaur identified in Alaska

New dinosaur identified in Alaska
Arctic dinosaurs have a new poster child. Ugrunaaluk kuukpikensis, a new species of duck-billed dinosaur, lived in what is now Alaska some 69 million years ago, scientists report...

mercoledì 23 settembre 2015

Having sex doesn’t trigger heart attacks, study suggests

Having sex doesn’t trigger heart attacks, study suggests
...

More than 9,000-year-old decapitated head discovered in Brazil

More than 9,000-year-old decapitated head discovered in Brazil
A human skull found in a Brazilian rock-shelter represents the oldest known case of decapitation in the Americas, researchers report September 23 in PLOS ONE. Radiocarbon dating places...

Balloons-and-glue device seals remote wounds inside the body

Balloons-and-glue device seals remote wounds inside the body
A pair of balloons and some glue can do the work of surgical stitches. Stitches — the wound closure method of choice for millennia — can be tricky to use in tight places. So Harvard...
 

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