Scientists at the Large Hadron Collider near Geneva celebrate after the particle accelerator started smashing protons at record energies earlier today. Fabrice Coffrini/AFP/Getty Images hide caption

itoggle caption Fabrice Coffrini/AFP/Getty Images

Janis Ruoff, an assistant research professor of special education at The George Washington University, uses a blackboard in her classroom. Many colleges and universities have turned to learning management systems to help teachers disseminate information electronically. Courtesy of William Atkins/The George Washington University hide caption

itoggle caption Courtesy of William Atkins/The George Washington University
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The Facebook culinary staff hustles to prepare 1,300 lunches per day, more than some restaurants serve over the course of a week. The cafe also serves about 600 breakfasts and 580 dinners each day. Rori Gallagher for NPR hide caption

itoggle caption Rori Gallagher for NPR