Thallium is one of the deadliest poisons ever discovered — a tasteless, odorless metal that slips into the body unnoticed and destroys it from the inside. From Victorian flame spectroscopy to 1930s ...

Add Yahoo as a preferred source to see more of our stories on Google. A November report from state officials found blood-thinning poisons in more than 69% of tested wildlife, including 95% of mountain ...