North Korea is celebrating the birthday of its founder, Kim Il Sung. The North's leader has been dead nearly 20 years but is treated like a god. And of course, his son; now, his grandson; have both succeeded him. As part of this year's festivities, North Korea sponsored a marathon in the capital, Pyongyang, that drew athletes from around the world; an event that came even though the North has been threatening a nuclear strike against the United States.
Tensions have been increasing between the United States and Russia, and things unraveled even more over the weekend. Russia named 18 Americans who will be barred from entering Russia because of an alleged involvement in human rights violations. Here's NPR's Corey Flintoff.
Most research on memory loss in the elderly focuses on dementia, Alzheimer's disease or other brain diseases.
But neuroscientist Emily Rogalski from Northwestern University's Feinberg School of Medicine knew there is great variation in how good memory is in older people. Most have memory loss to varying degrees, but some have strong memories, even well into old age.