SAN FRANCISCO, July 21 (Xinhua) -- A new study by U.S. nonprofit Common Sense Media has found that 72 percent of U.S. teens have tried an AI companion, according to a report by TechCrunch on Monday.

CANBERRA, July 26 (Xinhua) -- An Australian study shows social bonds with temperate fish help tropical fish thrive in cooler southern waters as oceans warm.