If dark energy is weakening, as suggested by recent results, then the cosmos is far stranger than most physicists had ...

These exclusive 4K iPhone nature wallpapers are for our readers. The collection features different types of nature wallpapers like minimalist, colorful, miniature, and more. All of these wallpapers ...

TNR’s Greg Sargent takes a critical look at the day’s political news and the stories leading NewRepublic.com, and speaks to leading journalists and newsmakers.