During the last ice age, two infants in what is now Alaska were laid to rest, precious hunting tools at their sides. Now, more than 11,000 years later, scientists announce the discovery of the tiny skeletons and their extraordinary burial spot—underneath the fire pit of an ancient house.

The find, described on Monday, is the first to show that the earliest Americans did such complex burials. What's more, the burial site reveals a cultural link between residents of North America and those of far eastern Asia, a jumping-off point for the earliest migrants to the New World.

The infants' bones were found just below a previously discovered grave that held the cremated remains of a toddler.