科学家们设计了一种只凭手腕运动就可以抓握物体的机械手。这只由英国剑桥大学研究团队研发的3D打印机械手中被放置了传感器，从而能够 “感知” 它所触摸的物体。 Researchers say their robotic hand can handle items that are currently too delicate for machines. The hand uses wrist ...

In the heart of Houston lies a bargain hunter’s paradise where the thrill of the find rivals any doorbuster sale, minus the 4 AM wake-up calls and shopping cart jousting tournaments – welcome to ...

Inside, the more established sellers maintain semi-permanent booths with glass display cases protecting valuable collectibles – gleaming coins arranged by date and mint mark, vintage jewelry catching ...