News
- Earth
It’s not nice to fool Mother Nature
Throwing tiny particles into the atmosphere to counteract global warming could cause extended droughts and other weather disruptions.
-
The origins of immunity?
In social amoebas, sluglike clusters of usually independent organisms, certain cells take on a protective role that hints at the origin of immune systems in higher animals.
- Animals
Tail singers
The male Anna's hummingbird impresses females and intimidates other males by making a whipping sound with its tail feathers.
- Physics
Road Bumps: Why dirt roads develop a washboard surface
Experiments and a computer simulation show why dirt roads develop a washboard surface, and indicate the only way to prevent it: Drive very slowly.
