Volunteers search for needles and other drug paraphernalia along Church Street in Austin, Ind., in April. The region has recorded 142 new HIV cases since December, according to the state, in an outbreak tied to injected-opioid use.
A giant cluster of about 3,000 stars called Westerlund 2. The cluster resides in a raucous stellar breeding ground known as Gum 29, located 20,000 light-years away in the constellation Carina.
NASA, ESA, STScI/AURA
A cherry tree and its blossoms are covered with snow in an orchard near Traverse City, Mich. Three years ago, almost every fruit crop in Michigan was frozen out when cold temperatures followed some 80 degree days in March.
John L. Russell/AP
"Part of the reason we're here is because climate change is threatening this treasure and the communities that depend on it," Obama said Wednesday of his visit to Everglades National Park in Florida. "If we don't act, there may not be an Everglades as we know it."
Mandel Ngan/AFP/Getty Images