"I am a former science teacher. This looks like an insert for a ripple tank. They are used for teaching wave physics. The ...

These small direct-point application pens are great. Keep one in the glove box, my kitchen 'junk' drawer, and the house ...

Even if you buy everything on this list, it'll still cost less than a single night in a mid-tier hotel. View Entire Post › ...

Partly cloudy. Medium chance of showers, becoming less likely later this evening. The chance of a thunderstorm, possibly severe. Winds southeasterly 15 to 20 km/h tending easterly 15 to 25 km/h in the ...