Science & Tech · Science & Environment · 6 hrs ago
Shorter lower-leg bones may have helped Arctic sled dogs pull heavy loads
Arctic sled dogs have unusually short lower-leg bones, which may have helped them pull heavy loads without tipping backward.
Researchers compared five leg bones from 80 modern animals, including sled dogs, other dogs and wolves.
They also examined 82 ancient bones from three sites on Russia’s Chukchi Peninsula, dating from the first centuries BC to the 16th century AD.
About 89% of the ancient bones matched the sled-dog pattern, including bones from three dogs buried on purpose.
The findings matter because sled equipment rarely survives, so dog remains can provide evidence of the long history of sledding.
The oldest known sledding evidence is about 9,000 years old, from sled parts found beside dog remains on Zhokhov Island in the Russian Arctic.
Arctic sled dogs have lower-leg bones about 6 percent shorter than those of wolves, village dogs and spitz breeds of similar size.
Researchers say the shorter bones may have helped the dogs resist tipping backward while pulling heavy loads.
The pattern was found in modern working sled dogs and in ancient dog bones from the Chukchi Peninsula.
The study examined 80 modern animals and 82 ancient bones.
- Who
- A research team led by archaeologist Mitya Kletzerman of the University of Haifa.
- What
- The team found that sled dogs have shorter lower-leg bones than comparison animals, a trait that may have helped them pull loads.
- When
- The ancient bones span the first centuries BC to the 16th century AD. The article was published on 2026-11-01.
- Where
- The modern dogs came from Greenland, Chukotka and Kamchatka; the ancient bones came from three sites on the Chukchi Peninsula in Russia.
- Why
- Shorter lower legs may have helped keep a dog’s weight low and resist the backward tipping force of a sled.
This story does not have two clearly opposing sides.
Arctic dogs appear to have formed a distinct lineage.
The oldest evidence of sledding, including sled parts beside dog remains, dates to Zhokhov Island in the Russian Arctic.
The ancient bones came from three sites on the Chukchi Peninsula and span this period.
- Modern sample
- 80 animals, including 22 working sled dogs
- Ancient sample
- 82 bones from three Chukchi Peninsula sites
- Bone difference
- Three lower-leg and forearm bones were about 6 percent shorter in sled dogs
- Ancient pattern
- 89 percent of the ancient bones matched the sled dog pattern
- Study leader
- Mitya Kletzerman, University of Haifa