Photo: Canada's Low-Gravity Puzzle Solved, Scientists Say



An artist's conception shows the pair of orbiting NASA satellites known as GRACE. Minute changes in Earth's gravity can be detected by precisely measuring how the distance between the two satellites changes.

A new study used GRACE data to help solve a longstanding mystery: an unusual area of low gravity in northern Canada.

Illustration courtesy NASA


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.