Diagnosing ozone damage early is both key for protecting crops and difficult, because farmers must act before damage becomes visible on leaves.To develop an early indicator of ozone damage, Trisha Andrew and her colleagues at the University of Massachusetts Amherst capitalized on one of the pollutant’s effects: when ozone kills a leaf’s cells, the leaf tissue becomes less electrically conductive. Da-Yong Jiang at Peking University in Beijing, Ryosuke Motani at the University of California, Davis, and their colleagues examined a mass of bones found in the stomach of an ichthyosaur belonging to the genus.The remains were those of a surprisingly large example of a type of marine reptile called a thalattosaur. The activity of other neurons was unchanged, which can skew an individuals’ experience of time, the researchers say.When swollen with glacial meltwater, Nepal’s Imja Lake posed such a hazard that the authorities mounted a massive campaign to lower its level. Liang Ning at Nanjing Normal University in China, Zhengyu Liu at Ohio State University in Columbus and their colleagues looked at records of past temperatures, as well as ice-core records and climate models, to unravel the mystery.The drought kicked off as a standard dry spell.
Credit: Dr Wei Wang.Scientists have pinpointed gene-activating stretches of DNA that help animals to regenerate limbs, fins and other tissues.Some vertebrates can regenerate tissues after injury, but many cannot — suggesting that this trait has been lost and gained across the vertebrate family tree.
And as waste-water treatments become more widespread in low-income countries, a growing proportion of the fibres are ending up in these terrestrial environments, the authors say.The Lion’s Gate was the southwestern entrance to Hattusha, which is located in modern-day Turkey and was once the capital of the Hittite empire. Lake volumes increased most at high latitudes.Bigger lakes pose greater hazards to mountain communities, because the water is often loosely dammed by glacier debris and can suddenly burst through, causing catastrophic flooding. A human femur that had been converted into a whistle, for example, was found in another person’s grave near Stonehenge, and the Yorkshire grave of an adult woman contained two substantially older skulls.This treatment suggests that human remains were often revered, rather than viewed with horror or disgust, the authors say.Some bacteria that can transmit electricity turn out to have a hidden talent: when grown on a copper electrode, they construct a network of copper sulfide compounds that boosts their conductivity.Copper is hostile to microorganisms, and as a result has long been used in antibacterial cladding for ships’ hulls, and in pots and pipes for drinking water. Credit: Getty.Time flies when you are busy, but when you’re bored, it seems as if the day will never end. The silo covered an area that was roughly the size of a football pitch and, when discovered, held hundreds of tonnes of intact grain (below) in layers more than one metre thick.Amy Bogaard at the University of Oxford, UK, and her colleagues examined the wheat and barley in 5 of the silo’s 32 chambers. The thalattosaur’s intact tail was found in nearby sediments.The scene suggests that the ichthyosaur ripped off the thalattaosaur’s head and tail using a ‘grip and tear’ strategy, not unlike that used by modern killer whales (,Water droplets can generate electricity by pattering onto a precisely engineered two-layer material.
These ‘subhaloes’ were more numerous, and their lensing was on average ten times stronger, than predicted by computer simulations of clusters formed according to existing theories of dark matter, the authors write.A worker sprays grapevines in France.
These ‘strong gravitational lenses’ had been imaged by the Hubble Space Telescope.As expected, most of the lensing power was centred around the clusters’ middle regions, where dark matter forms a dense ‘halo’. Local people aided the expedition with information about the creature’s abundance and preferred habitats — a reminder that vast troves of biological and ecological knowledge reside outside the scientific enterprise.A fossilized marine reptile’s bellyful of a second, slightly smaller marine reptile is visible as a block protruding from its abdomen.
The researchers speculate that in cold weather, torpor might extend over days in some species, becoming true hibernation.Among the galactic clusters examined by researchers seeking to understand the distribution of dark matter is MACSJ1206 (spread across centre of image), which distorts other galaxies’ light into smears and arcs.
Now scientists estimate that the volume of Earth’s glacial lakes has grown by nearly 50% in the past three decades.Dan Shugar at the University of Calgary in Canada and his colleagues analysed more than 250,000 images taken by the Landsat satellites. August 6, 2020, 11:29 pm explore: India Magnitude-7.8 Earthquake Hits Alaska, Tsunami Warning Issued Earlier Cancelled The quake struck off the coast, 105 km (65 miles) south-south east of Perryville, Alaska at a depth of 28 km, according to the US Geological Survey (USGS).
Participants tended to respond by misjudging its duration, and activity decreased in a group of brain cells involved in time perception, indicating neuron fatigue. In an effort to find out more, Blair Wolf at the University of New Mexico in Albuquerque and his colleagues captured 26 hummingbirds, encompassing 6 species, from the Andean forest, and observed them overnight.
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