TechnologyAn AI can beat CAPTCHA tests 100 per cent of the time CAPTCHA tests are supposed to distinguish humans from bots, but an AI system mastered the problem after training on thousands of images of road scenes ¿ìè¶ÌÊÓÆµ
EnvironmentEarth got even hotter than we thought during past 500 million years The average surface temperature varied more widely and was even hotter than previously thought during much of the past 500 million years, according to the most rigorous study so far ¿ìè¶ÌÊÓÆµ