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What you see in the beautiful images from the Hubble Space Telescope (and other instruments) is not what you would see with your own eyes.
For centuries it was thought that thin-film interference effects, such as those that cause oily pavements to reflect a rainbow of swirling colors, could not occur in opaque materials.
Filtersfast.com applies game-design techniques to non-game water filtration education.
- The horn of a unicorn considered as a medical or pharmacological ingredient.
- A winged horse with a single horn on its head; a winged unicorn.