Андрей Коюшков

Андрей Коюшков

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Андрей Коюшков
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Maingot's Abdominal Operations, 12th Edition

Maingot's Abdominal Operations, 12th Edition

How to Find True North Without a Compass — Basic survival skills are essential for anyone living off the grid, whether it’s by choice or in a SHTF situation. In the event that you have to navigate without landmarks, technology, or even a compass, you need to know how to find true north.

How to Find True North Without a Compass — Basic survival skills are essential for anyone living off the grid, whether it’s by choice or in a SHTF situation. In the event that you have to navigate without landmarks, technology, or even a compass, you need

Super Massive Black Holes Explained

Super Massive Black Holes by PHD Comics. Sagittarius A*, the super massive black hole at the center of the Milky Way, has a mass million times the mass of our sun, and a diameter equal to the distance between the sun and Mercury.