After a dose of ketamine, special video games that offered a depressed player positive feedback, in the form of smiling faces or encouraging words, seemed to boost the length of time the drug quelled depression. akinbostanci/Getty Images hide caption
Platen Heilmethode 1894. Grafissimo/Getty Images hide caption
William Simpson with a 2-year-old Appaloosa colt near the Soda Mountain Wilderness area, straddling the Oregon and California border, in July 2022. Michelle Gough hide caption
A recent study found that adding strangers to the mix of people we speak with might increase our happiness. Gpointstudio/Getty Images/Image Source hide caption
There have been a few long term studies of the box turtle that looked at box turtle populations over several decades. The studies showed big population declines—75 percent or more. Nell Greenfieldboyce/NPR hide caption
A Scarlet Tanager perches on a branch. In the Neversink Mounatin Preserve in Lower Alsace Township Tuesday afternoon June 22, 2021. Ben Hasty/MediaNews Group/Reading Eagle via Getty Images hide caption
The International Space Station is pictured from the SpaceX Crew Dragon Endeavour on Nov. 8, 2021. On Monday, the ISS had to fire its thrusters to avoid space junk. NASA Johnson Space Center via Flickr Creative Commons hide caption
The civil war in Ethiopia is destroying the medical system in the northern region of Tigray. Iman Raza Khan/Getty Images hide caption
It's best to chop up leaves, which will then break down in the grass. Rake excess amounts into a landscape bed. Kris Lord/Flickr Creative Commons hide caption
An electron microscope image shows a SARS-CoV-2 particle isolated in the early days of the pandemic. It's been nearly a year since omicron was first detected, and scientists say this branch of the coronavirus family tree is still thriving. NIAID/NIH via AP hide caption
In this photo provided by NASA, a partial solar eclipse is seen as the sun rises to the left of the U.S. Capitol in Washington, Thursday, June 10, 2021, as seen from Arlington, Va. Bill Ingalls/AP hide caption
Baker Lake is surrounded by Fall colors on October 8, 2022 near East Bolton, Quebec, Canada. SEBASTIEN ST-JEAN / AFP via Getty Images hide caption
Unwanted used plastic sits outside Garten Services, a recycling facility in Oregon. Laura Sullivan/NPR hide caption
Former NASA astronaut Scott Kelly, seen after he completed a year-long mission in space, in 2016, is one of 16 researchers selected for the study. Bill Ingalls/NASA/Getty Images hide caption