In my lowest moments, I look to the people who have devoted their lives to pursuing justice no matter what.

A close contact of someone with bird flu became ill on the same day, the C.D.C. reported. But the second person was not tested, and the cause of the illness is unknown.

© Jackie Katz Cynthia Goldsmith/C.D.C., via Associated Press

Recent studies show that certain feather pigments can help neutralize toxic pollution. It means darker, duller birds could have a survival advantage.

High in the boughs above us, the hackberry tree lays out its riches just as the fall migration is reaching its peak.

Some people in China flap and squawk on social media as way of escaping hustle culture. We can explain.