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 ...

Is it possible to count objects you can't see? If you've ever received a boxed gift, or a mysterious package from Amazon, you might have tried to lightly shake the box to try to guess its contents.

New research from Northwestern University shows 15-month-old infants can learn words for objects they've never seen. This ...

The sensorimotor stage is the first of the four stages of Piaget’s theory of cognitive development. It is marked by a child’s knowledge that the outside world exists separately from themselves. Once ...

It generally takes until preschool age for children to understand that a word like “four” represents a set, but new research from Johns Hopkins University suggests infants understand the concept of ...