Convection: Currents you can see
Drifting in a hot air balloon is an amazing way to experience firsthand the phenomenon of convection. But when it comes to visualizing convection, water is often a simpler medium than air.
One easy
Facing Russian Threat And An Uncertain America, Europe Rearms
Two words – stark, sober words – sum up a dramatic mood swing in Europe that could redefine, and ultimately loosen, the Continent’s decades-old alliance with the United States. War footing. That phrase, voiced most recently by British Prime Minister
