When Did the First Humans Move onto North America?

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An image of a mastadon thigh bone
The mastodon thigh bone discovered in San Diego (image credit: San Diego Natural History Museum).

Scientists have re-examined Mastadon bones found in the San Diego area in 1992. They find the bones to be over 100,000 years old. Moreover, the bones appear to have been broken by humans. This means that modern humans may have travelled to North America fare earlier than is commonly accepted, which is about 15,000 years ago.

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When Did the First Humans Move onto North America?
Paul Rincon
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Jesse Rogerson, PhD

Jesse is a passionate scientist, educator, and science communicator. As an assistant professor at York University in the Department of Science, Technology, and Society, he teaches three classes: History of Astronomy, Introduction to Astronomy, and Exploring the Solar System. He frequently collaborates with the Canada Aviation and Space Museum, and lends his expert voice to the Ingenium Channel. Jesse is an astrophysicist, and his research explores how super massive black holes evolve through time. Whether in the classroom, through social media, or on TV, he encourages conversations about how science and society intersect, and why science is relevant in our daily lives.