Printer Friendly

Ice-free passage.

More than 10,000 years ago, glaciers covered much of North America. New research suggests, however, that there was a period of time during the last ice age when North America wasn't as icy as once thought.

Ronald Janke, a geography professor at Valparaiso University, discovered that sand dunes currently found in Indiana were formed thousands of years ago, when sand blew over from Lake Michigan--something that couldn't have happened if the area had been covered by ice.

[ILLUSTRATION OMITTED]

This finding opens up the possibility that the Atlantic Ocean was also free of ice. That means some of the first people to settle North America could have traveled to the continent from Europe by boat. Other early settlers probably crossed the Bering Strait from present-day Russia to Alaska.

COPYRIGHT 2008 Scholastic, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2008 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:EARTH/ICE AGE
Author:Adams, Jacqueline
Publication:Science World
Article Type:Brief article
Geographic Code:1USA
Date:Oct 6, 2008
Words:129
Previous Article:Boogie bird.
Next Article:American idle.
Topics:


Related Articles
Antarctic algae weather UV rays.
Runaway heat? A darkening Arctic may accelerate warming trends there.
O river deltas, where art thou? Coastal sinking stalls sediment accumulation.
Shipping shortcut.
Dear Earth Talk: recent NASA photos showed the opening of the Northwest Passage and that a third of the Arctic's sea ice has melted in recent.

Terms of use | Privacy policy | Copyright © 2020 Farlex, Inc. | Feedback | For webmasters