NASA MAY HAVE FOUND ONE OF THE STRANGEST CLUES YET ON MARS—AND SCIENTISTS STILL DON’T HAVE A SIMPLE ANSWER FOR WHAT CREATED IT! 
Recent rover observations continue to reveal unusual rocks, chemical signatures, and geological formations, but “unexplained” doesn’t automatically mean extraterrestrial. Is this evidence of an unfamiliar Martian process, a clue from the planet’s wetter past, or something even more surprising? The evidence makes the mystery fascinating. What’s your theory?
