Siamese cats temperature-sensitive pigment dark extremities

Siamese cats grow darker fur on cooler parts of the body

The protein that makes dark pigment in Siamese cats works only when the skin is cool enough. Their ears, face, legs, and tail are cooler, so they become dark. Warmer parts of the body stay much lighter.

A simple eye can form an image without a lens

In a simple cup-shaped eye, making the opening narrower improves the image more than making the cup deeper. If the opening becomes small enough, the eye can form a real image and recognize basic shapes even without a lens.

Smarter elevators can make you wait longer

Some elevators ask for your destination before you enter. Their software groups passengers heading to similar floors, reducing stops and shortening rides. The trade-off is that you may wait longer in the lobby because the system chooses the most efficient car for the whole group, not necessarily the next available one.

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Siamese cats temperature-sensitive pigment dark extremities

Siamese cats grow darker fur on cooler parts of the body

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