NASA is tracking the bus-sized Upper Atmosphere Research Satellite (UARS) and expect it to fall to Earth Friday afternoon. Precisely where the UARS satellite will land is still uncertain - but not in North America, says NASA.
It is still too early to tell exactly where the dead satellite will fall. Scientists will likely have a much better idea of where the debris will land about two hours before the impact, NASA officials said.
Super-Earth: The newfound haul of alien planets includes 16 super-Earths, which are potentially rocky worlds that are more massive than our planet. One in particular has captured astronomers' attention because it orbits at the edge of its star's habitable zone, suggesting conditions could be ripe to support life.
Although cleanup methods for the oil spill in the Gulf of Mexico are still somewhat low-tech, high-tech solutions are on the way.
The oil spill that resulted from the explosion and sinking of an oil rig in the Gulf of Mexico last week is becoming more worrying as it continues to spread and efforts at stemming the flow of the leaking oil are being met with difficulties.
The science and history behind oil spills.