The loss of sea ice due to climate change is predicted to threaten the survival of polar bear populations across the Arctic by the end of the century, new research shows.
Why it matters: "Polar bears have long been considered messengers of the climate change symptoms that will impact all life, including humans," says Polar Bears International chief scientist Steven Amstrup.
The United Arab Emirates' Hope spacecraft launched Sunday on a journey to Mars.
Why it matters: This mission, which launched on an H2-A rocket from Japan, marks the UAE's first mission to Mars. It kicks off the first of three missions to the Red Planet this summer, with China and the U.S. to follow in the coming weeks.
