Apart from the great architecture, one question that long puzzled scientists is how Egyptians managed to move those colossal pyramid stones – some of which weigh several tons.
Researchers now suggest that the stones were dragged over wet sand. Their study, published in the journal Physical Review Letters and titled "Sliding Friction on Wet and Dry Sand", is based on a wall painting from the tomb of Djehutihotep, which depicts a person standing in front of a wooden sledge and wetting the sand.
Scientists are optimistic that having a full image of the human genome would help them better understand human evolution and pave the path for discoveries in
More flexible and better for the environment.
It is said to needed 36 percent less power to make and release up to 76 percent less carbon dioxide compared to standard bendable concrete made of concrete.
