Day 4 of the Masters at a glanceInt'l scientists conduct joint experiments with China's artificial sun teamEven the boss is worried! Hundreds of chief executives fear AI could steal their jobs tooChinese scientists invent ultrathin optical crystal for nextChina's satellite launch suffers abnormalityChase Elliott ends 42WWE star Big E reveals he may NEVER wrestle again after undergoing new neck scans, with 38Chinese scientists develop ultrastrong, high thermal insulating ceramicsChinese, Brazilian scientists name new flying reptiles to mark collaborationNew finds in China's Guizhou indicate prehistoric human activity over 55,000 years ago