The ProForm Pro 9000 is our pick for the best treadmill to buy on Black Friday. Its shock-absorbing belt make long runs comfortable and its 22-inch touchscreen brings iFit workouts to your fingertips.

More affordable than ever, 3D printers are booming for personal, professional, and educational use. We've been testing them for over a decade and are here to help you find the right option. Since 2004 ...