Mark Ruffalo is a master at playing a certain type of earnest character who often wears a quizzical expression — not because he's slow on the uptake, but because he's the smartest person in the room ...

Teflon, the nonstick pan coating made by DuPont, was originally praised as a great American innovation. But the chemical used to make it was toxic. DuPont dumped the byproducts of Teflon into ...