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Once upon a time, there was a man named Noah who lived in a world filled with many people who did not listen to or obey God. They were behaving in ways that made God sad. Read More
A 13-sided tile called “the hat” forms a pattern that covers an infinite plane, yet it cannot repeat, making it a long-sought shape known as an “einstein.” A sample of that pattern is shown here...
Body organs aren't all internal like the brain or the heart. There's one we wear on the outside. Skin is our largest organ—adults carry some 8 pounds (3.6 kilograms) and 22 square feet (2 square me...