Scientists have long speculated that the "dirtier" the environment we grow up in - with lots of germs from different people and even animals - the better off our immune system and physical health ultimately will be. A new study published Monday in Proceedings of the National Academy of Science provides early evidence that a dirty world might even be better for our mental health, too.
Tagged With microbial life
An international team of researchers say they have found fossils dating back to at least 3.77 billion years ago, making them the oldest fossils ever found on our planet. The discovery, though sure to attract scrutiny, has implications for our understanding of how life got started on Earth -- and how it may have emerged elsewhere.