A groundbreaking theory suggests that dark matter—the invisible material shaping galaxies—may have formed before the Big Bang ...

Of all the offbeat details in Young Sheldon's intro credits, one photo leaps out right away—a cow sitting serenely beside young Sheldon Cooper on a couch in the center of a Texas field.

Intriguingly, ultralight dark matter might be able to turn into photons (light) — and it's through this process that the ...

However, that isn’t what scientists see. Instead, stars orbit at about the same speed regardless of their distance from the galactic center. You might see this referred to as the "Galaxy Rotation ...