In this illustrated essay from NOVA Online, explore the cyclical process of weather creation and the effects of El Nino on the global weather system.

Determine parameters of weather; including specifically temperature, humidity, precipitation, wind direction and wind speed in this tutorial. During this tutorial, you will relate the jet stream and ocean circulation to the causes of...

Build your own bathtub or pool toy from simple craft materials in this fun activity. You will build a rubber-band-powered boat that can zip across the surface of the water after you wind up the rubber band.