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Meet the loneliest tree in the world.
As humans, we get a few more.
You don't just do "exercise." Why do you just do "meditation"?
Are you ready to tweet without typing?
A whole new kind of underground.
We all may be giant homing pigeons at heart.
The old 70 percent rule isn't quite right.
Time of death? Check the microbial life.
You began with a tiny fireworks show.
What do the different shades mean?