The so-called 'planetesimal belts' are filled with tiny millimeter-sized particles created by collisions between comets.

Scientists have developed an artificial intelligence (AI) tool in their quest to discover alien life ... to look for life on other planets. The AI, developed by a team led by Robert Hazen ...

These Martian rock samples are believed to hold valuable ... how the planet has changed over its lifetime. An artist’s concept of a Mars Sample Retrieval Lander. Image source: NASA The project ...