Never Underestimate the Power of a Reflex For developmentalists, newborn reflexes are mechanisms for survival, indicators of brain maturation, and vestiges of evolutionary history. For family members, they are mostly delightful and sometimes amazing. Both of these viewpoints are demonstrated by star performer Wyatt, who was born on March 1, 2013 in Brampton, Ontario. He is seen here sucking peacefully on his finger; grasping the finger of his big sister, Nicole; and stepping eagerly forward on legs too tiny to support his body.

SHEILA TRINIDAD AND JAMES FOX