1,500-year-old landfill discovered in USVI

(AP)—Crews renovating a public square in the U.S. Virgin Islands have discovered a 1,500-year-old landfill stuffed with shells, bones and pottery fragments.

What's eating the sea butterfly? CO2, study says

Rising acidity is eating away the shells of tiny snails, known as "sea butterflies", that live in the seas around Antarctica, leaving them vulnerable to predators and disease, scientists said Sunday.

Plant remains link farming to landscape damage in Peru

A study of food remains from ancient settlement sites along the lower Ica valley in Peru, confirms earlier suggestions that farming undermined the natural vegetation so badly that eventually much of the area had to be abandoned.

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