MindHow to reconnect with long-lost friends, according to science We are generally as reluctant to contact a long-lost friend as we are to talk to a stranger, but scientists have come up with an approach so it's easier to make the first move ¿ìè¶ÌÊÓÆµ
ChemistryUltrasonic coffee-maker produces the perfect cold brew in minutes Cold-brewing coffee can reduce its bitter taste, but it normally takes up to 24 hours as the grounds slowly steep. A new method that involves pummelling the grounds with ultrasound can drastically speed up the process ¿ìè¶ÌÊÓÆµ