Author name: Threeyzmonkeys

#1440 Why don’t giraffes faint?

Why don’t giraffes faint? Giraffes don’t faint because they have a very strong heart and a very high blood pressure. If we bend over and then stand up again, we get a head rush. Sometimes it can be so bad that you faint. This is called orthostatic hypotension. Your blood pressure is set at the

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#1438 How does a hologram work?

How does a hologram work? There are two types of holograms: the version that has a 3D image on a flat sticker, or plate, and the 3D kind that appears in the air out of nowhere. Surface holograms work by splitting light, and 3D ones work through several methods. A flat hologram is an attempt

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