Photo: Family Walks on All Fours, May Offer Evolution Insight, Experts Say



Siblings walk on all fours in rural Turkey. Three sisters and two brothers (one of whom is not shown) are almost exclusively quadrupedal, due to a genetic defect, scientists say.


Photograph courtesy BBC, from the TV documentary The Family That Walks on All Fours, airing on March 17 in the U.K. on BBC Two


EMAIL NEWSLETTER Photos and News of the Week

Get the top photos and news of the week from National Geographic News, plus occasional breaking-news alerts.

See Sample >>
Please enter a valid email address
Privacy Policy
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

Photo and Headline Widget

Put our latest news and photos on your Web page or desktop—automatically updates! See Sample