"If you could imagine a grandfather clock and see the pendulum swinging back and forth, ideally that pendulum would swing back and forth very uniformly," Ludlow says. "Each swing would take exactly the same amount of time."
That's stability. But what if something perturbs the system, like a mischievous toddler?
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.
Originally published on Wed August 7, 2013 2:40 pm
Credit Joyce Naltchayan / AFP/Getty Images
To commemorate the 50th anniversary of the civil rights' movement March on Washington for Jobs and Freedom, President Obama will deliver remarks from the steps of the Lincoln Memorial, the White House said today.
It was on those same steps that 50 years ago on August 28, that Martin Luther King delivered his iconic "I Have A Dream" speech.