The source of that stench: solidified blocks of 50,000-year-old regurgitated stomach oil from Antarctic Snow Petrels, hunks ...

Kelp, a kind of seaweed, can be used in biofuels that one day could power ships and aircraft. That would sharply reduce the use of gas and oil, which emit greenhouse gases that lead to global warming.

Tucked away in southwest Florida, visitors can find a prehistoric warm spring — the only one of its kind in the state.