Planet Earth

#81: Melting Ice Exposes the Past

By Emily ElertDec 16, 2010 12:00 AM


Sign up for our email newsletter for the latest science news

As ice patches melt around the world, archaeologists are finding remarkably preserved artifacts emerging from millennia of deep freeze. Last April, Craig Lee of the University of Colorado at Boulder announced the oldest discovery yet: the foreshaft of a 10,400-year-old wooden dart, recovered from melting ice near Yellowstone National Park. The slender birch object still shows the marks left by its maker’s stone tools. Artifacts made of organic materials like wood—much less likely than stone to survive the millennia—give us “another window to the past,” Lee notes.

Over the past decade, “ice-patch archaeologists” have scoured the earth’s northernmost latitudes. Lee looked farther south in the Rocky Mountains, hunting in shady valleys and along north-facing mountain slopes. His success was a matter of timing as much as strategy: Organic artifacts begin to decay the moment the ice melts back. When Lee found the wooden dart, it was “lying under the clear blue sky, exposed,” he says.

1 free article left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

1 free articleSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!


Already a subscriber?

Register or Log In

More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Our List

Sign up for our weekly science updates.

To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2021 Kalmbach Media Co.