Volcanic Rumblings

* Look out. She's gonna blow.

No, we're not talking about your 2-year-old sister on the verge of a temper tantrum. We're talking about Mount St. Helens, a famous volcano in Washington state, on the verge of an eruption.

The mountain gave off a huge blast of steam Friday. Earthquakes also have been detected on the mountain. The volcano's crater floor has been moving and so has its 1,000-foot lava dome. The dome is like a cork in a bottle keeping the magma (molten rock) in place.

How serious the eruption might be depends a lot on that magma and how much gas is fueling it. Scientists have detected more volcanic gases, including hydrogen sulfide (which smells like rotten eggs). An increase of volcanic gases usually means that the magma is rising inside the volcano.

When Mount St. Helens erupted in 1980, 57 people died. Nobody expects this eruption to be that bad.

The Smell of Success

* Sniff. Sniff. Sniff. How can you tell the difference between the smell of rotten eggs and pizza?

About 1,000 genes that live on proteins in your nose recognize all the different smells you smell.

Two American scientists, Richard Axel and Linda B. Buck, have won the Nobel Prize for medicine for discovering those genes.

The prizes are named after Alfred Nobel, who invented dynamite (!) and started the awards. More Nobels, including the winner of the Peace Prize, will be announced this week.

Michael Ballard gets a closer look at Mount St. Helens.