ScienceDaily: Fossils & Ruins News

An unexpected discovery suggests that the first humans may have arrived in North America more than 30,000 years ago - nearly 20,000 years earlier than originally thought.

Researchers analyzed CT scans of nearly every living amphibian genus to reveal that frogs have lost teeth over 20 times during their evolution, more than any other vertebrate group.

It is time for the management and conservation of the Antarctic to begin focusing on responsibility, rather than rights, through an Indigenous Maori framework, an academic argues.

The Tsimane subsistence communities living on the edge of the Bolivian Amazon have less inequality but also fewer chronic health problems linked to the economic disparity of industrialized Western societies. Researchers tracked 13 different health variables across 40 Tsimane communities, analyzing them against individual's wealth and each community's degree of inequality. While some have theorized that inequality's health impacts are universal, researchers found only two robustly associated outcomes: higher blood pressure and respiratory disease.

Although sun radiation was relatively low, the temperature on the young Earth was warm. An international team of geoscientists has found important clues that high levels of carbon dioxide in the atmosphere were responsible for these high temperatures. It only got cooler with the beginning of plate tectonics, as the CO2 was gradually captured and stored on the emerging continents.