Monday, October 27, 2008

A new look at Saturn's rings

This article is about how scientists from NASA are recounting the rings of Saturn, and found out that Saturn's rings are really young. The way these scientists are figuring out how old the rings are is the same way you do with a tree, you count how many rings there are. One ring equals 1 year. When they counted Saturn's rings, they found out that it was only 100 million years old which is little compared to the solar system which is 4.6 billion years old. The people who worked at NASA also determined the age by looking at the characteristics of particles in the rings. Since the rings were shiny and they were reflecting that meant that the particles were young. They thought they were young because they didn't have enough time to become darkened and less reflective. Other scientists say they they over looked some parts of the rings but I think they just missed a couple of circles that were really close together.

I got my info from: http://www.sciencenewsforkids.org/articles/20081022/Note3.asp    

Tuesday, October 14, 2008

Penguins Ride Air Force Jet to South Atlantic

This article is about how more than 370 penguins washed up on a northern Brazil beach, and no one knows how they got there. There were about 1,000 penguins that washed up and 20 percent died.  However, the ones who were healthy got sent back to southern Brazil in an air force cargo plane. People are calling this the biggest penguin release ever in South America. Experts hope that the older penguins will help the younger ones find their way to Patagonia. Also they said that a big breed of penguins in southern Argentina and Chile move north as far as southern Brazil. But environmentalists say it's not hoe the penguins got to northern Brazil. I think this is really weird how they don't know how the penguins got there. My guess is that the tides were really strong and pulled them all the way. 

I got my info from http://www.time.com/time/health/article/0,8599,1847845,00.html