Brian koberlein

 When our Universe was in its infancy, the only element it contained was hydrogen, the simplest one—not nearly enough by itself to create interesting things like planets and people. By the time things cooled sufficiently for the single proton in each hydrogen atom to pair with a negatively charged electron, about 92 percent of the […]

When you look in the mirror, the image you see looks a lot like you—not exactly the same, because when you raise your right hand, your mirror-self raises its left. What’s more, the mirror image is merely an assemblage of reflected light, without a physical body behind it. Despite these differences, you can see an […]