Gold mining carries serious risks, from mercury poisoning and silica dust to tunnel collapses and toxic tailings. Here's what miners and communities face.
Blue or green urine is usually harmless and linked to certain medications, dyes, or supplements — but here's when it might be worth a call to your doctor.
Trace human DNA has been found in hot dogs, but it's less alarming than it sounds. Here's what the science actually says about how it gets there and whether it matters.