"When you can't irrigate your crops, you can't have a city of 40,000, like some of the Maya cities were."
Global warming may cause the West Antarctic ice sheet to collapse, resulting in several metres of sea level rise.
Hydropower projects can permanently and irreversibly impact river and floodplain dynamics and functions,
Climate change is already affecting every region on Earth. The changes will increase with additional warming.
The ruminants are not only highly social but just how social they are has surprised even scientists.
A plant-centered diet is beneficial for cardiovascular health and it doesn't have to be fully vegetarian.