A new study confirms directly what scientists previously knew only indirectly — that poisonous "rotten egg" gas hydrogen sulfide is generated by the body's blood vessel cells. Researchers made the confirmation by developing a chemical probe that lights up in reaction to rotten egg gas. The scientists observed the process in living cells in real-time through a microscope, said chemist Alexander Lippert, Southern Methodist University, Dallas. "This is going to open up many experiments for scientists," Lippert said.
A higher resolution video is available at http://bit.ly/15ghBDs.