Due to snow, the Smithsonian's National Zoo will open at 10 a.m. today, Jan. 17, 2018.
Now playing at the National Air and Space Museum in Washington DC.
The planets, stars, and everything you can see are less than 5 percent of the universe. What is the other 95 percent? Dark Universe examines the invisible dark matter underlying galaxies that, together with dark energy, accounts for that other 95 percent of the universe’s total energy and mass. Narrated by astrophysicist Neil deGrasse Tyson.