Our planet’s history includes episodes of cold so extreme that glaciers reached sea level in equatorial regions. Source: https://earthsky.org/earth/whats-coldest-earth-has-ever-been…
Tag: glacial
New evidence for multiple ice ages on Mars
Earth has had at least 5 major ice ages. Now it appears Mars – the next planet outward from the sun – has undergone anywhere from half a dozen to 20 ice ages in the past several hundred million years. Source: https://earthsky.org/space/new-evidence-for-multiple-ice-ages-on-mars…
Opinion: Biden administration must act fast to save migratory birds
On Trump’s way out of the White House, his administration demolished a law that protects migratory birds, putting over 1,000 species at risk. The Biden administration can still salvage it, but only if they act swiftly. Source: https://earthsky.org/earth/biden-administration-migratory-bird-treaty-act…
Will iceberg twice the size of NYC break off Antarctica this year?
A crack on the Antarctic ice shelf grew dramatically in late 2020 into 2021. Scientists are watching to see if the rapidly accelerating crack will cause the shelf to rip apart before Antarctica’s sunlit summer season – going on now – comes to an end. Source: https://earthsky.org/earth/iceberg-brunt-ice-shelf-antarctica-break-off…
Ancient humans may have hibernated to survive brutal glacial winters
Signs of disease in the bones of hominins who lived in glacial Europe half a million years ago hint they hibernated to cope with harsh winters – but the evidence is disputed Source: https://www.newscientist.com/article/2262133-ancient-humans-may-have-hibernated-to-survive-brutal-glacial-winters/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Is Mars still volcanically active?
A new study of geologically young lava flows in Elysium Planitia suggests that Mars might still have residual volcanic activity below its surface. The finding could also correlate with seismic activity detected by the InSight lander in the same region and may have implications for possible martian life. Source: https://earthsky.org/space/mars-cerberus-fossae-young-lava-flows-volcanic-activity…
What is the moon’s terminator line?
The moon’s terminator is the dividing line between day and night on the moon. As we see it from Earth, it marks the line of lunar sunsets or sunrises. Earth and other worlds in our solar system have terminator lines, too. Source: https://earthsky.org/astronomy-essentials/definition-moon-planet-terminator-line-twilight-zone…
Scientists discover ancient lake bed deep beneath Greenland ice
The ancient lake bed, sealed more than a mile under Greenland ice, may be hundreds of thousands or millions of years old, and contain unique fossil and chemical traces of past climates and life. Source: https://earthsky.org/earth/ancient-lake-bed-deep-beneath-greenland-ice…