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First Signs of Spring
Sunlight drives all living systems. Energy from the sun increases, temperatures rise, and plant growth begins. Latest news...

daffodils emerging in Italy

Photo: Don Gawlik

Sunlight and the Seasons
How does daylight change in your part of the world as the Earth revolves around the Sun? Share and compare observations with people around the globe.

Phenology: Phenology is the study of the seasonal timing of life cycle events. Explore how changes in sunlight affect the entire web of life. Plants grow, flowers bloom, animals migrate. Report observations from your part of the world!

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