A glacier in Patagonia, Argentina, calves, with a sudden collapse of ice. Researchers say that the activity that precedes these types of tipping points and the triggers that cause them may follow predictable patterns.
Philip Stanley Dickson/iStockphoto.com
In the study, cotton-top tamarins grew calmer after they heard music compositions based on their own calm, friendly calls, and became more agitated when exposed to music that contained elements of their own threatening or fearful calls.
Bryce Richter/University of Wisconsin-Madison
These healthy newborn monkeys, Mito and Tracker, developed from embryos containing transplanted DNA. They are named after the dye "mitotracker" used for imaging mitochondria in cells.
Oregon National Primate Research Center at OHSU
A coral reef near the Caribbean island of Bonaire teems with plant and animal life. Rising water temperatures and increasing ocean acidity pose enormous threats to this wondrous but vulnerable ecosystem.
A longfin damselfish patrols its algae garden off the coast of Bonaire. Damselfish kill a section of the coral, and then wait for algae to grow in the dead spot. On this coral, only a few live sections remain.
Passengers on a whale-watching ship in Massachusetts Bay. Whale watching is one of many recreational activities that draw people to the waters off the coast of Massachusetts.
Kerry Crisley/The Nature Conservancy