Human breast milk is uniquely adapted to meet an infant's nutritional needs. Surprisingly, we still know very little about ...

More affordable than ever, 3D printers are booming for personal, professional, and educational use. Here's everything to know before you buy one, along with the top models from our hands-on testing.

A group of North Texas doctors and scientists printed part of a human femur — the longest and strongest bone in the body — that mimics the strength, flexibility and overall mechanics of a real femur.