Mark Zuckerberg built a glowing wooden box to help his wife sleep better

C Flanigan / Contributor / Getty Images Facebook CEO Mark Zuckerberg built a glowing wooden box to help his wife, Dr. Priscilla Chan, sleep better. The box emits a soft light from 6 a.m. to 7 a.m. every morning. "As an engineer, building a device to help my partner sleep better is one of the best ways I can think of to express my love and gratitude," Zuckerberg wrote. Mark Zuckerberg just posted a photo of his latest invention on Facebook and Instagram. No, it's not social media-related. It's a ...