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Puzzle #1 in our 2020 Christmas puzzle series

Yuliya Nesterova orders some polynomials around

Why do Christmas lights get tangled? And what's the perfect way to decorate a Christmas tree? Find the answers here.

After 100 years, a key postulate of the third law of thermodynamics has been proven. We meet Lluis Masanes, one of the researchers responsible.

Folding origami, building networks, making projections and multiple dimensions!

What a difference a matrix makes