ENVIRONMENT
See good news for birds in “So far, the great tit has coped with climate change.”

LIFE
Fossils show how birds shifted their weight as they evolved. Read “Birds may have had to crouch before they could fly.”

Flowerlike corals pulsate to boost photosynthesis by algae harbored inside. See “Why corals do calisthenics.”

RANDOMNESS
Tom Siegfried examines theories of generosity in “Greed may breed financial fitness, but evolution allows unselfishness to survive.”

Use up and down arrow keys to explore.Use right arrow key to move into the list.Use left arrow key to move back to the parent list.Use tab key to enter the current list item.Use escape to exit the menu.Use the Shift key with the Tab key to tab back to the search input.