Asteroids: between threats and scientific opportunities
IN BRIEF Asteroids: monitored to assess the risks to Earth. Threats: encountering asteroids a kilometer in diameter can be fatal. Risks: about one threatening asteroid strikes Earth every 600,000 years. Dinosaur extinction: the impact of an asteroid 65 million years ago caused a mass extinction. NASA: regularly observes near-Earth objects and their potential danger. Opportunities: … Read more