Sceince of dating events using ice

08-Nov-2019 06:33

"What would it mean for species or life at the time?It's a huge open question," says Jennifer Marlon, a paleoclimatologist at Yale University.It advances on the Arctic Ocean not in a straight wall, but in a conspicuous semicircle, as though spilling out of a basin.Kjær, a geologist at the Natural History Museum of Denmark in Copenhagen, suspected the glacier was hiding an explosive secret.C., Kjær and 21 co-authors report today in a paper in .The crater was left when an iron asteroid 1.5 kilometers across slammed into Earth, possibly within the past 100,000 years.Below is a list of the 1272 science fair project ideas on our site.

Soon, his target came into view: Hiawatha Glacier, a slow-moving sheet of ice more than a kilometer thick.A white fireball four times larger and three times brighter than the sun would have streaked across the sky.