Giant prehistoric Meteroite Impact in Australia

Did a meterorite that landed in Australia 250 million years ago cause the Permian-Triassic extinction event that caused the death of 90% of life on Earth? How archaeologists in Mexico search for hidden spaces in a pyramid by counting nuons from space. Sperm found to contain messenger RNA as well as DNA. Scientists search for distant planetary systems in Sagittarius using gravitational microlensing.