ScienceGravity-type real-life disaster waiting to happen because of space junk, warns lawmakers Problem of space junk takes center stage as experts testify before a U.S. House committee. Catastrophic collisions are a real risk, lawmakers hear.by Jim Algar
ScienceNuclear explosion-level asteroid impacts more common than previously thought: Is Earth in danger?by Jim Algar
ScienceBlind Luck: It's what saves Earth from getting destroyed from asteroid impact, say former NASA astronautsby Jim Algar
ScienceEvidence of explosive volcanic activity on Mercury a surprise, may shed light on how the planet formedby Jim Algar
ScienceAsteroid Redirect Mission: NASA is looking for heroes and will pay you to become oneby James Maynard