The World in a Grain: The Story of Sand and How It Transformed CivilizationRenvall, BrianLibrary journal.
“Wait, is this some kind of joke?” Maybe this was not real money, but it looked pretty real. Then I read the papers and found that some old lady left her savings to her family. All this was too strange. I fell a mess in my mind. Suddenly my mother knocked on my bedroom door...
Some are as small as a grain of sand. Others are as large as a house.These small pieces began to travel around Saturn. Saturn's gravity(引力) pulled them toward it. At the same time, the speed of their orbit(轨道) tried to throw them into space. Over time, these pieces of ice ...
About a third of the planet’s food goes to waste, often because of its looks. That’s enough to feed two billion people.
The sand and the inner tubes will play the role of the professional table's honeycombs and pneumatic supports. If you don't have enough space for such a large table, you can improvise using cups of sand or sugar to hold each piece of equipment, but these won't be as steady as a ...
meaning cut just outside the line. This allows you a bit of a safety margin and you can always sand to the line to sweeten it up. This is where the elbow grease really kicks in. It takes hours to cut out the hull panels by hand, but it's worth it. I tried cutting the first ...
Similarly, you can repurpose the function of unused rooms along with their existing furniture. For example, a rarely-used formal dining room can be transformed into a home office. Instead of buying a new ergonomic desk and chair, use the dining table as a large desk, reupholster the existing...
Fragments of space rocks are omnipresent in space. About 48.5 tons (44 metric tonnes) ofmeteoriteshit Earth each day,according to NASA. Most of these fragments are as tiny as a grain of sand and burn up without any fuss immediately upon enteringEarth's atmosphere.The Planetary Science Institut...
Just a bit of water enables one to turn a pile of dry sand into a spectacular sandcastle. Too much water however will destabilize the material, as is seen in landslides. Here we investigated the stability of wet sand columns to account for the maximum height of sandcastles. We find that ...
plant seeds with a mechanical planter to ensure uniform spacing. The ideal depth for sowing seeds is about an inch (2–3 cm), and the recommended planting distance between rows of rice is 8–10 inches (20–25 cm).By following these guidelines, large agricultural enterprises may build a sol...