An asteroid nine times the size of a cruise ship is dropping by Earth on Friday, and it's not coming alone. Asteroid 1998 QE2 will be about 3.6 million miles from our planet at its closest approach. And its proximity has already given scientists a surprise: It has its own moon, measured at about 2,000 feet wide.
Houston, Texas provides a dramatic example that it's possible to make great strides in reducing air pollution. Our story yesterday talked about how that came about, but Houston still does not quite meet the federal smog standard. So, the question for the nation's fourth largest city is what's next. NPR's Richard Harris explores that question as part of our series Poisoned Places.
Brazil is a paradise for birds; the country has more than 1,700 species. Among them is the colorful toucan, a bird with an almost comically giant bill that can be half as long as its body. There are lots of different types of toucan — red-breasted, channel-billed, keel-billed, saffron toucanet — each with its own color-scheme and distinctive call.
When you pick up a cut of beef at the store, would you like to know that animal's life history? The technology to do this does exist — at least in Michigan, where the state requires all cattle to carry electronic ear tags. It's the only state that requires such tags.
Michigan's cattle-tracking system was forced on farmers because of a crisis. Fifteen years ago, cattle in part of the state started catching tuberculosis from wild deer.
If you stand in front of Almena and Sidney Poray's house in Baton Rouge, La., and look straight down the street, past the other houses and the shade trees, you see more than a dozen plumes of exhaust in various hues of gray and white.
"That's something you see every day, the same thing if not more," says Almena Poray. "Sometimes it's a darker gray; sometimes it's a black smoke coming out."