Why do only some leaves turn red in the fall? Scientists can't agree on an answer The red pigments in some fall leaves have proven to be a puzzle for researchers who debate why leaves bother to go red. Nell Greenfieldboyce
FEMA promised funds to tsunami-proof an Oregon hospital. That money is MIA The federal government promised an Oregon hospital millions of dollars to help prepare for an earthquake. They're still waiting for the money. Katia Riddle
Trump once again nominates tech space traveler Jared Isaacman to serve as NASA administrator President Donald Trump announced Tuesday he has decided to nominate Jared Isaacman to serve as his NASA administrator, months after withdrawing the tech billionaire's nomination because of concerns about his political leanings. The Associated Press
Scientists can't agree on why some autumn leaves go red Leaves often turn brilliant colors in autumn. One of those colors has generated a lot of heated debate among scientists in recent years. Nell Greenfieldboyce
Too many rats? Birth control is one city's answer Rats aren't just a nuisance. They can carry diseases and are a leading causes of property damage. One community in Massachusetts is trying a novel approach to rat reduction: Birth control. Ari Daniel
How a great-grandmother helped researchers unravel a dinosaur mummy mystery A paleontologist was trying to locate the site of a famous 1908 discovery when a rancher in Wyoming shared an important clue. Bill Chappell
Why an interstellar comet has scientists excited The comet could be older than our solar system. The comet is also distinct because nickel vapor was detected in the gas surrounding it. Jaclyn Diaz
This week's Short Wave news roundup Regina Barber and Emily Kwong of Short Wave talk about spider web architecture, storytelling and memory, and why more TV pixels may not translate to a better viewing experience. Ailsa Chang
Scientists thought this fossil was a teen T. rex. Turns out it's a new tyrannosaur A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land. Ari Daniel
An Alzheimer's pill appears to protect some in a high-risk population A new study is reviving hope that a twice-daily pill can slow down Alzheimer's in people whose genes put them at high risk for the disease. Jon Hamilton