Numeracy or numerosity, the ability to think about and use numbers, varies among human cultures and within populations, much like intelligence does. Many known languages, for example, have no words ...

Students in Melissa Williams' kindergarten class at the Westminster School in Atlanta, Georgia, practice connecting quantities to written numbers — a key part of number sense. Credit: Holly Korbey for ...

The original version of this story appeared in Quanta Magazine. A new proof has brought mathematicians one step closer to understanding the hidden order of those “atoms of arithmetic,” the prime ...

When Reiko Horst was diagnosed with early-stage breast cancer, she knew next to nothing about the disease. To help determine the best treatment plan, her medical oncologist at Fred Hutchinson Cancer ...

A red knot is a tiny shorebird that makes an epic 9000-mile journey all the way from the arctic to the tip of southern Chile and back. Biologists and nature enthusiasts congregate at various points ...