National Academy of Sciences – आवारा मुसाफिर

Top predators could ‘trap’ themselves trying to adapt to climate change, study shows

June 29, 2022198 Views

As climate change alters environments across the globe, scientists have discovered that in response, many species are shifting the timing of major life events, such as reproduction. With an earlier spring thaw, for example, some flowers bloom sooner. But scientists don’t know whether making these significant changes in life history will ultimately help a species survive or lead to bigger problems. A study published the week of June 27 in the Proceedings of the National Academy of Sciences shows for the first time that a species of large carnivore has made a major change to its life history in response to a changing climate — and may be worse off for it. An African wild dog mother and pup. Photo: Bobby-Jo Vial A team led by researchers at the University of Washington, in collabora...

जलवायु परिवर्तन

Greenland Ice Sheet becoming world’s largest ‘dam’

AWARA MUSAFIR BUREAU

February 24, 20221159 Views

Melting rate accelerating at the most important ice on Earth Researchers have observed extremely high rates of melting at the bottom of the Greenland Ice Sheet, caused by huge quantities of meltwater falling from the surface to the base. As the meltwater falls, energy is converted into heat in a process like the hydroelectric power generated by large dams. An international team of scientists, led by the University of Cambridge, found that the effect of meltwater descending from the surface of the ice sheet to the bed – a kilometre or more below – is by far the largest heat source beneath the world’s second-largest ice sheet, leading to phenomenally high rates of melting at its base. Water flowing into a moulin and down to the bed of Store Glacier, Greenland. Photo: Poul Christoff...

खबरनामाघटनाएंस्पेन

Prehistoric cave paintings in Spain show Neanderthals were artists

AWARA MUSAFIR BUREAU

August 8, 20211324 Views

Neanderthals may have been closer to our species of prehistoric modern human than previously believed after cave paintings found in Spain proved they had a fondness for creating art, one of the authors of a new scientific report said on Sunday. Visitors walk in the "Room of the Stars", in a prehistoric cave where red ocher markings were painted on stalagmites by Neanderthals about 65,000 years ago, according to an international study, in Ardales, southern Spain, August 7, 2021. REUTERS/Jon Nazca Red ochre pigment discovered on stalagmites in the Caves of Ardales, near Malaga in southern Spain, were created by Neanderthals about 65,000 years ago, making them possibly the first artists on earth, according to the study published in the Proceedings of the National Academy of Sciences (P...