Drought killed off inedible plants in Kruger National Park, making room for other plants that animals like to eat.
Researchers find that wildfires are responsible for up to 20 percent of water flowing in some Western U.S. streams.
Nutrition, food safety and local norms among many considerations that aid groups weigh before and during disaster response.
The 5.4 magnitude earthquake suggests that even small volumes of water can trigger large events.
Deep layers may reveal prehistoric earthquakes, showing how often they strike New England.
Scientists are training computers to help us stop asteroids from crashing into our planet.