A northern swath of Amazon rainforest bigger than Maryland and containing at least 350 bird species became the world’s largest tropical national park Thursday.

RIO DE JANEIRO, Brazil -- A northern swath of Amazon rainforest bigger than Maryland and likely containing a treasure trove of undiscovered animal, insect and plant species became the world's ...

A young nothern bearded saki monkey is seen in a tree in the Tumucumaque Mountains National Park. The area became the world's largest tropical national park Thursday after Brazillian President ...

RIO DE JANEIRO, Brazil - A northern swath of Amazon rainforest bigger than Maryland and containing at least 350 bird species became the world's largest tropical national park Thursday.