A snuggling ball of cute  

A snuggling ball of cute

We don"t really need an excuse to feature this adorable photo of twin cubs asleep inside a snow den in Wapusk National Park in Manitoba, Canada. But it just so happens that today is International Polar Bear Day, the perfect day for this shot from the 2007 documentary film "Earth," which focuses on wild habitats and creatures across the planet.

© AF archive/Alamy

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