It's not every day that you get to turn off a major waterfall.
Near Iraq's northernmost point, close to Turkey and Iran, a national park of snow-capped peaks and forested valleys is drawing tourists and researchers keen to explore a hardly touched land.
Going against the flow is always a challenge, but some waterfall-climbing fish have adapted to their extreme lifestyle by using the same set of muscles for both climbing and eating, according to research published January ...
How fast can evolution take place? In just a few years, according to a new study on guppies led by UC Riverside's Swanne Gordon, a graduate student in biology.