Comet 41P/Tuttle-Giacobini-Kresák is a bit of an oddity as far as comets go. Another weirdo in the latest line of them, with the king of…

If you were in the Midwest late Tuesday night and saw a streak of light rip across the sky, your eyes were working fine. A…

If you ever fell asleep mad about a problem and woke up with a solution, your brain probably pulled a problem-solving switch overnight without actually…

Back in 1976, NASA’s Viking Landers looked for life on Mars and came up empty. Today, a group of scientists argue that, on the contrary,…