钢铁神兵2

视频简介

An alarmingly disproportionate number of Black women are failed every year by the U.S. maternal health system. Shamony Gibson and Amber Rose Isaac were vibrant, excited mothers-to-be whose deaths due to childbirth complications were preventable. Now, their partners and families are determined to sound a rallying cry around this chilling yet largely ignored crisis. Directors Pau...。Richard Feynman is one of the most iconic, influential and inspiring scientists of the 20th century. He helped design the atomic bomb, solved the mystery of the Challenger Shuttle catastrophe and won a Nobel Prize. Now, 25 years after his death - in his own words and those of his friends and family - this is the story of the most captivating communicator in the history of scien...。Consumers love - and live on - their smartphones, tablets and laptops. A cascade of new devices pours endlessly into the market, promising even better communication, non-stop entertainment and instant information. The numbers are staggering. By 2020, four billion people will have a personal computer. Five billion will own a mobile phone. But this revolution has a dark side, hid...。