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- Better chow yields more milk: A more nutritious form of corn for dairy cows boosts farm profits, teen investigator finds
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- Building with moon rocks: Working on the moon with lunar soil and grit could prove easier, more efficient and less costly than using earthly materials
TREFOIL KNOTS
These three knots are different configurations of an overhand knot, called a trefoil. The usual, simplest configuration is on the left. Friedman used the one in the middle as the basis for his sculpture.
Credit: Nat Friedman http://math.albany.edu/~artmath
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