While investigating a cave high in the mountains of Mexico, a spelunker thought she had found a pile of trash from a modern-day litterbug. But upon closer inspection, she discovered that the "trash" was actually a cache of artifacts that may have been used in fertility rituals more than 500 years ago.
"I looked in, and it seemed like the cave continued. You had to hold your breath and dive a little to get through," speleologist Katiya Pavlova said in a translated statement. "That's when we discovered the two rings around the stalagmites."
