Schoolchildren, families, and citizen scientists around the world will gaze skyward after dark from October 20 to November 3, looking for specific constellations and then sharing their observations through the Internet.

Student scientists from the United States and around the world are converging in South Africa this month in what is likely to be one of the largest-ever international gatherings of teenage researchers.

A nationwide initiative starting tomorrow will enable volunteers to track climate change by observing the timing of flowers and foliage.