Crayons, of course. Scented markers. Colored pencils, presharpened. And coloring books by the jillions. Why do people like coloring so much? For grown-ups, I can totally get the nostalgia — and the ...

We've compiled a list of the 11 best science-themed coloring books that you can find online. They cover everything from neuroscience to ecology to the cosmos, so grab your colored pencils and crayons ...