Stone Age "sacred arc" The other newfound stone circle lies about 1 mile (1.6 km) north of the Metheral circle and Endacott has dubbed it "Irishman's Wall," after a local land feature.

A high school teacher didn't expect a solution when she set a 2,000-year-old Pythagorean Theorem problem in front of her students. Then Calcea Johnson and Ne'Kiya Jackson stepped up to the challenge.

Consider a mathematical knot: a string that’s been twisted and tied up, its ends then closed to form a loop. From the outside, it might look like a tangled mess. But an ant walking along it would ...

Connecting all the dots, we discover that a circle in taxicab geometry looks like a diamond. It has corners, and it’s not round. One of my students shouted in protest when she realized this.

When a 5.2 earthquake hit near San Diego, the San Diego Zoo Safari Park caught its elephants on video taking action to protect their young, forming what experts call an "alert circle." ...