Wednesday, 8 February, 2012

Moon was formed by impact of Theia with Earth. How do we know this, and why might we care?

How violins make sound. And why the ear is the world’s most sophisticated spectrum analyzer.

Giant volcano at Yellowstone erupts on schedule. The last eruption covered about 20 states with ash. If Yellowstone blows, think big: Think REALLY BIG!

How bad is the asteroid threat to Earth, and what are they doing to find any killer asteroids out there? Read the delightful debate between the no-problem and the killer-asteroid schools of thought.

New searches are finding lots of asteroids. None of them are aimed at us — yet. How much damage have asteroids done in the past?

So what’s the deal with the simple water spider? This eight-legged marvel speeds across the water fast enough to escape predators, find prey, and chase off intruding spiders. But how does it move? It must be pushing the water backwards, but what is doing the pushing?

New, large radio telescope gets better view of the universe. Want to tune in?

Are air bags dangerous if used properly? How do air bags work, and why are they being used on Mars?