Our planet inhabits a hazardous environment. Earth is continually bombarded by cosmic objects. Luckily for its inhabitants, most of these objects are very small and cause no harm to life. Some, ...

A small object recently captured by Earth’s gravity may not be a natural satellite at all. According to Harvard astrophysicist Avi Loeb, the mysterious body, known as 2025 PN7, could be a lost piece ...