On our 26th episode of Firsts, Wiz Khalifa reveals what he believes he's learned about Earth's shape after traveling around ...

Mathematical evidence indicates that our universe is flat, but it could be infinitely big, as well. You can figure out if an ...

Earth’s tilt is what causes the seasons; in the summer, when our planet’s pole is tipped toward the sun, the days are longer, ...

After defeating the Chicago Cubs 10-4 on April 14, the Padres possessed an MLB-best 14-3 record, two-and-a-half games ahead ...

There's no shortage of round celestial objects in our universe. Planets, moons and stars all exhibit lovely spherical shapes.