Why might the U.S. be interested in deep-sea mining, and what are the environmental risks? Here's what you need to know.

The ‘David Packard’ is named for the Silicon Valley pioneer who donated more than $1 billion to ocean research.

This should be the case for all Democratic leaders. After all, a lot is at stake, and the president is not without his ...

From dormant volcanoes and salt pans to urban forests and library gardens, these are the places we go for peace and quiet.