On a recent morning, Patty Stonesifer sat cross-legged on the floor of a day care classroom, laughing as pre-schoolers clambered into a fire truck made out of a cardboard carton.
This is a far cry from Stonesifer's old life. She made her fortune in the tech world, where she rose through the ranks at Microsoft to become its highest-ranking female executive.
Later, she became the founding CEO of the Bill and Melinda Gates Foundation — the largest philanthropic organization in the world, with huge, global goals and an endowment of $34 billion when she left in 2008.
The house of kidnapper and rapist Ariel Castro, the man who was sentenced to life in prison plus 1,000 years last week, has been razed. Michelle Knight, one of the three women for whom the house became a prison for nearly a decade, was on hand for the demolition Wednesday.
Scientists have known for years that dolphins recognize each other by the sound of each animal's signature whistle. But it wasn't known for just how long dolphins could remember these whistle calls.
The individually specific whistle that each dolphin generates before its first birthday "for them functions like a name," says Jason Bruck, who studies animal behavior at the Institute for Mind and Biology at the University of Chicago.