NPR's Juana Summers talks with Regina Barber and Emily Kwong of Short Wave about "scuba-diving" lizards, a trick to turn a mouse's skin transparent and whether finger counting helps kids' math skills.

Finger-counting is a key "stepping stone" to higher math ability for youngsters, say scientists. Get any of our free email newsletters — news headlines, sports, arts & entertainment, state legislature ...

Counting on fingers really does help youngsters improve their maths skills, according to a new study. The research is the first to show that children's performance in arithmetic can show a "huge" ...