An orange clownfish, Amphiprion percula, lives in symbiosis with a host anemone on the Great Barrier Reef. Alejandro Usobiaga/Scientific Reports hide caption
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Thursday
Locals have been tweeting photos of fire ant colonies drifting aimlessly in the floodwaters of Hurricane Harvey. Juan DeLeon/Icon Sportswire/Getty Images hide caption
Volunteers unload one of 35 dogs flown from Texas shelters to Seattle in Hurricane Harvey's aftermath. The dogs arriving in Seattle were already in Texas shelters when Harvey hit and are being transferred so animals displaced by the flooding can be cared for until they can be reunited with their families. Elaine Thompson/AP hide caption
Wednesday
Troy King navigates his boat through a flooded portion of Highway 90 in Houston on his way to rescue the Galvan family. Katie Hayes Luke for NPR hide caption
Riding With A Rescue Mission In The Surreal, Perilous Texas Floods
The typical asymmetrical lymphedema (lower limb swelling) seen in podoconiosis. The skin on the affected limbs is thickened with warty and mossy nodules. The toes are disfigured with joint fixation typical of advanced podoconiosis disease. Christine Kihembo/ASTMH & AJTMH hide caption
Tiny turtles are cute, but they can spread salmonella and make children very sick. susan.k./Getty Images hide caption
Volunteers organize stacks of donations that were dropped off Tuesday at the North Dallas location for Hurricane Harvey victims. Tony Gutierrez/AP hide caption
A refinery in Deer Park, Texas, in the aftermath of Hurricane Harvey. Some residents and environment groups are worried about toxic chemicals that could be emitted into the air if there's any damage. Brendan Smialowski/AFP/Getty Images hide caption
Flooded Texas Chemical Plants Raise Concerns About Toxic Emissions
Tuesday
These dead sharks were discovered aboard a Chinese-flagged vessel found off Ecuador earlier this month with some 300 tons of marine species, several of which are in danger of extinction. Galapagos National Park via AP hide caption
The ship Steve Irwin, from the fleet of environmental activist group Sea Shepherd, sits at anchor near Perth, Australia, in 2011. Greg Wood/AFP/Getty Images hide caption
Gentrification brings with it new restaurants, businesses and housing but often pushes out longtime residents. Jay Lazarin/Getty Images hide caption
President Trump and first lady Melania Trump arrive in Corpus Christi, Texas, on Tuesday. Jim Watson/AFP/Getty Images hide caption