Child life specialist Kelly Schraf helps to put at ease Yoselyn Gaitan, 8, who had surgery on her cleft palate, at Children's National Medical Center in Washington, D.C.
Jenny Gold for NPR
Data from the Twins Early Development Study shows areas in the U.K. where the effect of environmental factors, shown in pink, trumps the influence of genes, shown in blue, and vice versa.
First Lady Michelle Obama gardens in Soweto township, in Johannesburg, South Africa. The first lady has planted a garden on the South Lawn of the White House — it's the first vegetable garden to be planted there since Eleanor Roosevelt's victory garden.
Charles Dharapak/AFP/Getty Images
A nurse in Washington administers the whooping cough vaccine to a child in May. In response to the epidemic, more than 82,000 adults have also received the vaccine this year.
Ted S. Warren/AP