Flowers have a way of doing that. They began changing the way the world looked almost as soon as they appeared on Earth about 130 million years ago, during the Cretaceous period. That’s relatively recent in geologic time: If all Earth’s history were compressed into an hour, flowering plants would exist for only the last […]

Step 1 : Start with a square piece of origami paper. If you only have regular 8.5×11 paper, Step 2 : follow these instructions to make a square sheet. Step 3 : Fold the paper in half by folding the upper left corner to the lower right corner. Step 4 : Fold in half again […]

Key points. Animal behavior includes all the ways animals interact with other organisms and the physical environment. Behavior can also be defined as a change in the activity of an organism in response to a stimulus, an external or internal cue or combo of cues.

Sing and dance to this Super Simple and fun version of the classic nursery rhyme, What makes a happy child who grows into a happy adult? Since happiness is a by-product of emotional health, this whole website is about helping you raise a happy child, from meeting your infant’s need to be soothed, to helping […]