How many people need to be in a room before there's a greater probability than chance that two of them share a birthday? Numberphile approaches the famous birthday paradox without a computer.

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Infinity Nikki animals are absolutely adorable, and, with the help of your animal-grooming ability, they're also a great source of unique materials. In this guide, we help you track down all the ...

Is there an infinity of infinities? The question sounds almost absurd, like a child’s riddle meant to twist your brain into knots. But for mathematicians, it’s a serious (and endlessly fascinating) ...