Researchers have analysed the oxygen isotope ratios in fossilised dinosaur teeth, specifically the tooth enamel. The tooth ...

New reports out of the NOAA and Scripps Institution of Oceanography suggest that the carbon dioxide (CO2) levels in Earth's atmosphere haven't been this high in millions of years.

New data shows that CO2 levels have broken through 430 parts per million, an indication that human-caused global warming will continue to warp the environment.

The planet hit that grim milestone in 2013. And now, scientists have warned that levels of CO2 could reach 500 ppm within 30 years. But human society is already in uncharted territory.