The president and his family are due in the islands Friday night to begin the final Hawaii vacation of his time in office.

A new aerial survey shows more plastic and debris has collected at the outer edges of the floating garbage heap than previously thought.

The sexually transmitted disease remains treatable, but health officials worry that this could change.

Famed conservationist E.O. Wilson says climate change is a threat. But he also worries about Republican presidential nominee Donald Trump and people with nuclear codes.

"Simply not being on Earth, I think everyone would agree, is the most challenging part of space.”

The ongoing coral carnage may be what makes climate change real for many of us.

In Florida, the idea is being considered to battle Zika and dengue. But scientists have long considered a similar approach to help birds.

There's past evidence of mega-tsunamis triggered by massive earthquakes off the coast of Alaska's Aleutian Islands.

Scientists are concerned that too much human interaction may harm the animals, and a federal agency may propose restrictions.