Water is very, very slightly blue under balanced light conditions actually.
In physics, an single electron that can pass with equal chance through one of two holes passes through one of the holes when you are observing it and both (!) of them when you aren't.
The world's largest organism is a honey mushroom that covers 8.9 square kilometers in the Malheur National Forest in Oregon, underground but appearing as isolated clumps across the area.
In a rainbow event on Earth, there is a main rainbow, a second (often called a "double") rainbow and a third rainbow around the Sun. You can also have an icebow.
Ubuntu. Linux for human beings.
If you are interested in trying Ubuntu or Linux in general, PM me and I will answer your questions and help you install it if you wish.











