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Pollination: it's vital to life on Earth but largely unseen by the human eye. Filmmaker Louie Schwartzberg shows us the intricate world of pollen and pollinators with gorgeous high-speed images from his film "Wings of Life," inspired by the vanishing of one of nature's primary pollinators, the honeybee.

And that's why it's not great news that bees haven't been doing so well in recent years. Last year, the United States lost 40 percent of its honeybee population, a devastating loss. No one is exactly sure what's causing the collapse, but climate change, pesticide use, disease, and habitat loss are all suspect. And other countries around the world are having the same difficulties. In Norway, which also noticed declines in bee populations, people are creating a 'bee highway' that gives bees a safe haven in the middle of the country's capital city.