Old footprints

NY Times science news:

What is one to make of the intriguing footprints found in Mexico?

The scientists who discovered them said last summer that they were made by humans walking in fresh volcanic ash 40,000 years ago. This seemed incredible, since no human presence in the Americas had been established earlier than about 13,000 years ago.

So geologists went to the scene, near Puebla. They came to an even more astonishing conclusion: the prints were in 1.3-million-year-old rock, meaning the prints were laid down more than a million years before modern Homo sapiens evolved in Africa.

There is something seriously wrong with this story. If they are really human footprints, then they should be added to The 10 Most Puzzling Ancient Artifacts.