Greg O'Brien (left), with Colleen, Mary Catherine, Conor, and Brendan O'Brien, has been grappling with Alzheimer's disease for the last five years. Courtesy Greg O'Brien hide caption
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Saturday
Football rules, uniforms, helmets and protective gear have changed a lot over the years. Keystone-France/Gamma-Keystone via Getty Images hide caption
Friday
Think of human relationships as entanglements. How do they bind you; how do they reveal who you really are? Daniel Horowitz for NPR hide caption
Jeremy the Koala. BBC Weather hide caption
Augustine Goba (right) heads the laboratory at Kenema Government Hospital in Sierra Leone. He and colleagues analyzed the viral genetics in blood samples from 78 Ebola patients early in the epidemic. Stephen Gire/AP hide caption
Thursday
Opening statements are delivered in June 1990 in the Central Park rape trial in New York in this artist's rendering. The defendants — including Yusef Salaam (from left), Antron McCray and Raymond Santana, shown here — were convicted and imprisoned in part on what were later found to be false confessions. A new study shows it's surprisingly easy to implant memories of committing a crime. Marilyn Church/AP hide caption
Genetically modified rice plants are shown in a lab in 2006. A new report from Pew Research shows a wide gap between perceptions of safety of GM foods between scientists and the general public. Rich Pedroncelli/AP hide caption
Environmental groups cited Wendy's as "Poor" in the area of packaging sustainability. One reason is that the chain still uses black plastic bowls, which cannot be recycled. Lynne Sladky/AP hide caption
Former Los Alamos National Laboratory nuclear physicist Pedro Leonardo Mascheroni was sentenced Wednesday to five years in jail. Heather Clark/AP hide caption
Wednesday
A Sierra Nevada red fox was photographed twice in recent weeks, thanks to a remote motion-sensitive camera. National Park Service hide caption
Nobel Prize-winning physicist Charles Townes was single-minded about a lot of things, colleagues say. And also a very nice guy. Julian Wasser/The LIFE Images Collection/Getty hide caption
K-Cups: Quick, convenient ... and nonrecyclable. Patrick Gensel/Flickr hide caption
A couple of male, genetically modified Aedes aegypti mosquitoes take flight. Dr Derric Nimmo/Oxitec hide caption
Can you find Australia and Canada? The cartogram scales each country's geographic area by its population. (Click through to see a high-resolution map.) Original work courtesy of Paul Breding. Copyright 2005, ODTMaps.com, Amherst, MA. Adapted by Reddit user TeaDranks hide caption
Research into how the human brain develops helps explain why teens have trouble controlling impulses. Leigh Wells/Ikon Images/Corbis hide caption