A team of researchers from Zhejiang University School of Medicine has developed a gel that makes enamel repair itself.
Astronaut Chris Hadfield performed the experiment on the International Space Station.
The cloud formation, undulatus asperatus, looks like a rolling ocean in the sky.
British-born photographer Christian Sasse captured his stunning shots in New South Wales, Australia.
Imagine if travelling around space was considered the same as backpacking around Europe.
Two newly released photos show that Uranus is not just a featureless ball of bluish-green gas further out in our solar system.