LoginWhy do only some leaves turn red in the fall? Scientists can't agree on an answer
The red pigments in some fall leaves have proven to be a puzzle for researchers who debate why leaves bother to go red.
(Image credit: Charlie Riedel)
Reading view
As hundreds of millions of birds head south, the invisible danger is glass
It's the peak of the fall migration season. This is when bird deaths from window collisions tend to spike, even though simple solutions can prevent this.
(Image credit: Angel Ruszkiewicz)
Artificial light has essentially lengthened birds' day
Millions of audio recordings of hundreds of bird species have revealed that artificial light is making the birds wake up earlier and go to bed later.
(Image credit: Rasit Aydogan)
