First African evidence to support hypothesis of an asteroid impact that contributed to the extinction of large animals 12 800 years ago. Image: Map showing simular platuinum spikes throughout the globe. Credit: Francis Thackeray | Wit University A team of scientists from South Africa has discovered evidence partially supporting a hypothesis that Earth was struck […]
Leaving cloven hoofprints from the Yukon-Kuskokwim Delta to the Arctic National Wildlife Refuge, more than 3,500 muskoxen live in Alaska. All of those shaggy, curly-horned beasts came from one group of muskoxen that survived a most remarkable journey in the 1930s. In 1900, no muskoxen existed in Alaska. Though the stocky, weatherproof creatures have survived […]
HANOVER, N.H. – Surface meltwater draining through and underneath Greenland’s tidewater glaciers is accelerating their loss of ice mass, according to a Dartmouth study that sheds light on the relationship between meltwater and subglacial discharge. The findings appear in the journal Annals of Glaciology. A PDF is available on request. Greenland has the potential to […]
The firn layers of the Greenland ice sheet might store less meltwater than previously assumed. Researchers from the USA, Denmark and the University of Zurich fear that this could lead to increased release of the meltwater into the oceans. The near-surface layers of the Greenland ice sheet are made up of snow that is […]