BBCnews is reporting what was initially thought to be a stunning discovery of early man's move to the Americas may end up being just a bunch of chipped rock:

Impressions in volcanic ash hailed as footprints made by the earliest known human settlers in the Americas may not be what they seem, Nature journal says.

If confirmed, the 40,000-year-old marks would have debunked accepted theories of human migration into the Americas.

But the ash has now been dated to 1.3 million years ago - more than a million years before modern humans evolved.

There's a chance they might be hominid (H. erectus was wandering around Eurasia at this time), but the smart money is on some sort of mistaken identity.