Denisovans, humans may have shared Tibetan Plateau A 40,000-year-old rib bone from a cave on the Tibetan Plateau adds to limited fossil evidence of Denisovans and suggests modern humans coexisted with these close cousins in the region at the time. The fossil is the youngest Denisovan bone found to date, and researchers say modern Tibetans […]
Imagine you’re standing near the edge of the Antarctic Ice Sheet, gazing out over the ocean, when the ice near you starts to melt very rapidly. A surge of meltwater flows into the ocean. Surprisingly, you watch the sea level fall – not rise. But why? When we think of sea level rise, we picture […]
Why did humans evolve without tails? Though humans’ ape ancestors have tails, we evolved without them due to a single gene mutation, which was pinpointed through researching the genomes of six ape species and 15 monkey species. Scientists are unsure whether becoming tailless was an evolutionary benefit or a chance mutation, but one theory is […]
Moons crashing together may have created Saturn’s rings Saturn’s iconic rings may be the result of a collision between two moons made of ice and rocks. Scientists simulated almost 200 collision scenarios and found that the impact of two moons roughly the size of Saturn’s current moons could disperse into icy rings, consistent with the […]
Annulated sea snakes do have genes to see colour Annulated sea snakes, a venomous species found in the oceans of Australia and Asia, can see colour, debunking assumptions of colorblindness after surviving the last 110 million years in the ocean. Researchers used genome sequencing to find four intact copies of the opsin gene SWS1 — […]
meltwater Author: Alun Hubbard, Professor of Glaciology, Arctic Five Chair, University of Tromsø I’m striding along the steep bank of a raging white-water torrent, and even though the canyon is only about the width of a highway, the river’s flow is greater than that of London’s Thames. The deafening roar and rumble of the cascading […]
According to a recent study , humans have displaced a significant volume of water from the ground and relocated it, resulting in an Earth shift of approximately 80 centimetres (31.5 inches) eastward solely between 1993 and 2010. According to prior climate models, researchers had initially estimated that humans extracted around 2,150 gigatons of groundwater between […]
Rising seas, oxygen depletion led to mass extinction Rising seas likely contributed to high hydrogen sulfide levels and oxygen depletion that killed marine life during Earth’s Devonian period over 350 million years ago. Researchers analyzed black shale samples from the Bakken Formation underlying parts of North Dakota and Canada, finding that waters were drained of […]
Over two-thirds of world’s glaciers will melt by 2100 More than two-thirds of the world’s glaciers will disappear by 2100 if the climate continues to warm at current trends. The global temperature is on track to rise 2.7 degrees Celsius over pre-industrial levels by the end of the century, but scientists note that if future […]
When polar seas freeze and ice forms, it is not only due to cold air chilling the surface of the water. Even more important is that warm water is prevented from rising to the surface from the depths of the ocean, due to the much lower salinity of the surface water. Sea ice forms in […]