New research suggests that penguins' ancestors originated not in frozen Antarctica but, instead, off the coasts of Australia and New Zealand, adapting to new climes over 22 million years.
Contrary to the image of sharks as lone predators, new research has found evidence that some species are social creatures who return repeatedly to the same fellow sharks, often for years.
California led the nation in issuing a statewide stay-at-home order. And it's paying an economic price: a $54 billion deficit. As the state reopens, it seeks to balance the economy and public health.