ScienceDaily: Top Science News, 21 Feb 2019

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ScienceDaily: Top Science News


Zebra stripes are not good landing strips

Posted: 20 Feb 2019 11:50 AM PST

The stripes of a zebra deter horse flies from landing on them, according to a new study.

    

Ingredients for water could be made on surface of moon, a chemical factory

Posted: 20 Feb 2019 09:19 AM PST

When a stream of charged particles known as the solar wind careens onto the moon’s surface at 450 kilometers per second (or nearly 1 million miles per hour), they enrich the moon’s surface in ingredients that could make water, scientists have found.

    

A volcanic binge and its frosty hangover

Posted: 20 Feb 2019 08:22 AM PST

A major volcanic event could have triggered one of the largest glaciations in Earth’s history — the Gaskiers glaciation, which turned the Earth into a giant snowball approximately 580 million years ago. Researchers have discovered remnants of such a large igneous province that resulted from vast lava flows.

    

Earth may be 140 years away from reaching carbon levels not seen in 56 million years

Posted: 20 Feb 2019 08:22 AM PST

Total human carbon dioxide emissions could match those of Earth’s last major greenhouse warming event in fewer than five generations, new research finds. A new study finds humans are pumping carbon dioxide into the atmosphere at a rate nine to 10 times higher than the greenhouse gas was emitted during the Paleocene-Eocene Thermal Maximum (PETM), a global warming event that occurred roughly 56 million years ago.

    

Young bone marrow rejuvenates aging mouse brains

Posted: 20 Feb 2019 07:33 AM PST

A new study has found that transplanting the bone marrow of young laboratory mice into old mice prevented cognitive decline in the old mice, preserving their memory and learning abilities. The findings support an emerging model that attributes cognitive decline, in part, to aging of blood cells, which are produced in bone marrow.

    

Foreign bees monopolize prize resources in biodiversity hotspot

Posted: 20 Feb 2019 07:33 AM PST

New research revealed that foreign honey bees often account for more than 90 percent of pollinators observed visiting flowers in San Diego, considered a global biodiversity hotspot. The non-native bees have established robust feral populations and currently make up 75 percent of the region’s observed pollinators. Their monopoly over the most abundantly blooming plant species may strongly affect the ecology and evolution of species that are foundational to the stability of the region’s plant-pollinator interactions.

    

Citizen scientist finds ancient white dwarf star encircled by puzzling rings

Posted: 19 Feb 2019 10:27 AM PST

The oldest and coldest known white dwarf — an Earth-sized remnant of a sun-like star that has died — could be the first known white dwarf with multiple dust rings. The discovery forces researchers to reconsider models of planetary systems.

    

Homo sapiens colonized South Asian rainforest by hunting small mammals 45,000 years ago

Posted: 19 Feb 2019 08:17 AM PST

A new study provides direct evidence for the hunting of tree-dwelling monkeys and other small mammals by Homo sapiens 45,000 years ago in the rainforest of Sri Lanka.

    

Gene therapy durably reverses congenital deafness in mice

Posted: 19 Feb 2019 08:16 AM PST

Scientists have managed to restore hearing in an adult mouse model of DFNB9 deafness — a hearing disorder that represents one of the most frequent cases of congenital genetic deafness. Individuals with DFNB9 deafness are profoundly deaf as they are deficient in the gene coding for otoferlin, a protein which is essential for transmitting sound information at the auditory sensory cell synapses.

    

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Russ Roberts

https://hawaiisciencedigest.net

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