The remains of two Ice Age babies that died over 11,000 years ago have been discovered in Alaska along with "unprecedented" grave offerings.

The infants are the youngest human remains ever to be discovered in the North American Arctic and provide vital information about funeral practices among inhabitants at the time.

Researchers from the University of Alaska Fairbanks examined the dental and skeletal remains of the two babies to determine that one was just a few weeks old, while the other died in utero.