Thirty years ago this weekend, seven people died from ingesting Tylenol that had been poisoned. Since then, Johnson & Johnson has overhauled its packaging. iStockphoto.com hide caption

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Bats harbor many types of coronaviruses and were probably the original source of the new coronavirus that appeared in the Middle East. iStockphoto.com hide caption

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A contractor designed the Squatty Potty to help his mother get closer to the squatting position on the john. Courtesy of Squatty Potty hide caption

itoggle caption Courtesy of Squatty Potty

Michelle Kloser, School Nutrition Director for the West Salem School District in Wisconsin took this picture of Thursday's lunch, which includes baked chicken and rosemary potatoes. Michelle Kloser/ for NPR hide caption

itoggle caption Michelle Kloser/ for NPR

From left: Frank Wild, Ernest Shackleton, Dr. Eric Marshall and Jameson Adams head back to base camp after getting within 97 miles of the South Pole — closer than anyone had gotten before them — in January 1909. /Getty Images hide caption

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The Emperor's Himalayan lavender tea is popular at Washington, D.C.'s Park Hyatt Tea Room, but please don't put milk in it. Courtesy of Park Hyatt hide caption

itoggle caption Courtesy of Park Hyatt

Fire department personnel, police officers and paramedics at the scene of a fatal collision on Highway 401 in Mississauga, Ontario, in July 2011. Stacey Newman/iStockphoto.com hide caption

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U.S. troops from the 2nd Battalion, 87th Infantry Regiment patrol at dawn in Kandalay, Afghanistan on Aug. 4, 2011. A worldwide stand down for troops to take part in suicide prevention training Thursday is part of the Army's response to an alarming suicide rate of nearly one per day. Romeo Gacad/AFP/Getty Images hide caption

itoggle caption Romeo Gacad/AFP/Getty Images

Cheryl Gleasner, a research technologist at the Los Alamos National Laboratory, works with a genome sequencing machine designed for disease surveillance. Since the SARS epidemic in 2003, advances in sequencing technologies have greatly speed up the ability to detect and track a new virus. Ross D. Franklin/AP hide caption

itoggle caption Ross D. Franklin/AP