NPR's Ailsa Chang talks with Emily Kwong and Regina Barber of Short Wave about the fluid dynamics of crowds, an early fossil of a modern bird and new data on how people's moods change through the day.

KWONG: How our mood may be better in the morning. CHANG: Nope. BARBER: And a fossil that might shed light on the early ancestors of modern birds ... CHANG: Which sounds kind of unsafe, looking ...

Oh, these beautiful fall days and nights are here again. The leaves are turning, the air is crisp, and the nights are cool. As always, the seasons are changing and the birds are changing with ...

The Eagles won the second Lombardi Trophy in franchise history after beating the Chiefs, 40-22, in Super Bowl LIX.

Musicians Northern Cardinals and Song Thrushes Among the earliest risers in North America, Northern Cardinals often begin ...

My next guest analyzed 100,000 bird sounds from all over the world to try to peck out ... You can also hear the gibbons singing because this is early in the morning just when they are waking up. There ...

Delaware Online/The News Journal reporters will be bringing you live coverage all day from the Eagles Super Bowl parade.

I was still in my pyjamas – curled up on a picnic rug scattered with comfy cushions and a soft waffle blanket draped across my shoulders – listening to early-morning bird calls from ...