15 years after BP oil spill, Louisiana coast marine recovery still ongoing
Cicada maps show where the insects will emerge in the U.S. this spring
A massive brood of cicadas will soon emerge. Here's what to know.
Remains of 5,000-year-old "elite woman" found at former garbage dump
"Bone collector" caterpillar disguises itself in the remains of its prey
NASA releases stunning space photos to mark Hubble anniversary
Coral reef bleaching hits 84% worldwide, worst on record, surveys show
Reporter's Notebook: If Earth's entire history was squeezed into a single day
