A lot of things are symmetrical – cats, dogs (bilateral symmetry), planets, stars (spherical symmetry), galaxies, pies ...

Although it is certainly correct that all sea urchins live in the sea, not all urchins have five-fold symmetry. In fact, not all urchins are rounded either. This is an academic reference book about ...

Canadian Prime Minister Justin Trudeau and Mexican President Claudia Sheinbaum pledged to “enhance the strong bilateral relations” between their two countries the same day President Trump ...