Finger-counting is a key "stepping stone" to higher math ability for youngsters, say scientists. Children who count on their fingers between the ages of four- and six-and-a-half years old have better ...

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.

If you ask a small child a simple maths question, such as 4+2, they may count on their fingers to work it out. Should we encourage young children to do this? This seemingly simple question is ...