Why do some snakes bite when you touch them, while others don’t? A Brazilian scientist trod on snakes tens of thousands of times in a bid to answer this question. His method was not without danger, even though he wore a specially-made protective boot to gently step on the snakes. In the process, he discovered he was allergic to the antivenom and snake toxins, resulting in prolonged hospitalization. In the latest from the dpa trends & features desk, we hear why his study can help save lives by ensuring antivenoms are distributed to the hospitals that are likely to need them most. Allison Willia…