For several years, certain beaches in the Caribbean, Mexico, West Africa, and even French Guiana have been invaded by massive carpets of brown algae. These algae are called sargassum. They ...

That would have produced phosphorus and marine oxygen crucial for the transition ... which emit hydrogen, hydrogen sulfide, and methane, could have provided the ideal conditions for the formation of ...

People have long wondered what life was first like on Earth, and if there is life in our solar system beyond our planet.

Paul Vanduyne Jr. and Andrea Whitaker of Madison, Wisconsin allegedly tried to poison two women using cyanide, hydrogen sulfide, thallium and abrin.

The one sensible thing coming out of Washington, D.C., is the decision to stop minting copper-plated cent coins, saving 220 ...