Showing 20 articles starting at article 321
< Previous 20 articles Next 20 articles >
Categories: Paleontology: Climate, Space: Astronomy
Published Best areas for rewilding European bison
(via sciencedaily.com) Original source Simulations integrate historical records, fossils, and ancient DNA to reveal why the European bison nearly went extinct, and pinpoint optimal areas for conservation. Since the near-extinction of the European bison, enormous conservation efforts have helped to restore wild populations, and its numbers are on the rise. However, the study authors argue that ensuring the species's long-term protection and recovery requires understanding why they nearly went extinct in the first place. 'Our study also suggests areas where rewilding attempts are most likely to be successful,' said lead author July Pilowsky, currently a disease ecologist at Cary Institute of Ecosystem Studies. Pilowsky completed the research while working on their PhD at University of Adelaide and University of Copenhagen.
Published NASA's Webb stuns with new high-definition look at exploded star
(via sciencedaily.com) Original source Like a shiny, round ornament ready to be placed in the perfect spot on a holiday tree, supernova remnant Cassiopeia A (Cas A) gleams in a new image.
Published 14-inch spacecraft delivers new details about 'hot Jupiters'
(via sciencedaily.com) Original source The Colorado Ultraviolet Transit Experiment (CUTE) spacecraft is about the size of a cereal box. It has also recorded incredibly detailed measurements of the atmospheres of planets hundreds of light-years from Earth.
Published Scholars say it's time to declare a new epoch on the moon, the 'lunar Anthropocene'
(via sciencedaily.com) Original source According to anthropologists and geologists, it's time to acknowledge humans have become the dominant force shaping the moon's environment by declaring a new geological epoch for the moon: the Lunar Anthropocene. They argue the new epoch may have dawned in 1959 when the USSR's unmanned spacecraft Luna 2 alighted on the lunar surface.
Published Giant doubts about giant exomoons
(via sciencedaily.com) Original source The extrasolar planets Kepler-1625b and Kepler-1708b are supposedly the home worlds of the first known exomoons. A new study now comes to a different conclusion.
Published Geoscientists map changes in atmospheric carbon dioxide over past 66 million years
(via sciencedaily.com) Original source An international consortium of geoscientists has reconstructed atmosphereric levels of carbon dioxide going back 66 million years using proxies in the geoloogical record. Today's concenteration, 420 parts per million, is higher than it's ever been in 14 million years.
Published Climate change shown to cause methane to be released from the deep ocean
(via sciencedaily.com) Original source New research has shown that fire-ice -- frozen methane which is trapped as a solid under our oceans -- is vulnerable to melting due to climate change and could be released into the sea.
Published Limitations of asteroid crater lakes as climate archives
(via sciencedaily.com) Original source In southern Germany just north of the Danube, there lies a large circular depression between the hilly surroundings: the Nördlinger Ries. Almost 15 million years ago, an asteroid struck this spot. Today, the impact crater is one of the most useful analogues for asteroid craters on early Mars. Studying the deposits of the former lake that formed in the crater is particularly informative. These deposits have been of great interest ever since NASA began exploring Martian craters for signs of water and life on Mars.
Published Unlocking neutron star rotation anomalies: Insights from quantum simulation
(via sciencedaily.com) Original source A collaboration between quantum physicists and astrophysicists has achieved a significant breakthrough in understanding neutron star glitches. They were able to numerically simulate this enigmatic cosmic phenomenon with ultracold dipolar atoms. This research establishes a strong link between quantum mechanics and astrophysics and paves the way for quantum simulation of stellar objects from Earth.
Published Astronomers determine the age of three mysterious baby stars at the heart of the Milky Way
(via sciencedaily.com) Original source Through analysis of high-resolution data from a ten-meter telescope in Hawaii, researchers have succeeded in generating new knowledge about three stars at the very heart of the Milky Way. The stars proved to be unusually young with a puzzling chemical composition that surprised the researchers.
Published Can signs of life be detected from Saturn's frigid moon?
(via sciencedaily.com) Original source Researchers have shown unambiguous laboratory evidence that amino acids transported in the ice plumes of Saturn's moon, Eceladus, can survive impact speeds of up to 4.2 km/s, supporting their detection during sampling by spacecraft.
Published Interpreting the afterglow of a black hole's breakfast
(via sciencedaily.com) Original source An entirely new way to probe how active black holes behave when they eat has been discovered by an international team of astronomers.
Published 10-billion-year, 50,000-light-year journey to black hole
(via sciencedaily.com) Original source A star near the supermassive black hole at the center of the Milky Way Galaxy originated outside of the Galaxy according to a new study. This is the first time a star of extragalactic origin has been found in the vicinity of the super massive black hole.
Published More than a meteorite: New clues about the demise of dinosaurs
(via sciencedaily.com) Original source What wiped out the dinosaurs? A meteorite plummeting to Earth is only part of the story, a new study suggests. Climate change triggered by massive volcanic eruptions may have ultimately set the stage for the dinosaur extinction, challenging the traditional narrative that a meteorite alone delivered the final blow to the ancient giants.
Published Dark galactic region nicknamed 'The Brick' explained with Webb telescope findings
(via sciencedaily.com) Original source Using the James Webb Space Telescope, astronomers spot unexpected source of carbon monoxide ice at galactic region surprisingly devoid of stars.
Published Crocodile family tree mapped: New light shed on croc evolution
(via sciencedaily.com) Original source Around 250 million years ago, 700 species of reptiles closely related to the modern-day crocodile roamed the earth, now new research reveals how a complex interplay between climate change, species competition and habitat can help explain why just 23 species of crocodile survive today.
Published Ghostlike dusty galaxy reappears in James Webb Space Telescope image
(via sciencedaily.com) Original source Astronomers studying images from the James Webb Space Telescope have identified an object as a 'dusty star-forming galaxy' from nearly 1 billion years after the Big Bang. They have also discovered more than a dozen additional candidates, suggesting these galaxies might be three to 10 times as common as expected. If that conclusion is confirmed, it suggests the early universe was much dustier than previously thought.
Published Aging societies more vulnerable to collapse
(via sciencedaily.com) Original source Societies and political structures, like the humans they serve, appear to become more fragile as they age, according to an analysis of hundreds of pre-modern societies. A new study, which holds implications for the modern world, provides the first quantitative support for the theory that the resilience of political states decreases over time.
Published Meteorites likely source of nitrogen for early Earth
(via sciencedaily.com) Original source Micrometeorites originating from icy celestial bodies in the outer Solar System may be responsible for transporting nitrogen to the near-Earth region in the early days of our solar system.
Published Discovery of planet too big for its sun throws off solar system formation models
(via sciencedaily.com) Original source The discovery of a planet that is far too massive for its sun is calling into question what was previously understood about the formation of planets and their solar systems.