A new University of Florida study that determined the age of skeletal remains provides evidence humans reached the Western Hemisphere during the last ice age and lived alongside giant extinct mammals.

University of California, Berkeley, scientists are drilling into ancient sediments at the bottom of Northern California’s Clear Lake for clues that could help them better predict how today’s plants and animals will adapt to climate change and increasing population.

While we may brush and floss tirelessly and our dentists may regularly scrape and pick at our teeth to minimize the formation of plaque known as tartar or dental calculus, anthropologists may be rejoicing at the fact that past civilizations were not so careful with their dental hygiene.