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Known as 'Aurora borealis' in the north and 'Aurora australis' in the south, these bright dancing lights are actually collisions between electrically charged particles from the sun that enter the earth's atmosphere.
Enjoy time-lapse videos of a variety of flowers blooming open to full glory - and some dying away. (with gentle music)
For about 56 million years, butterflies have been bringing joy to the world. Here we watch them dine on nectar and move together in a flutter.