The Scale of the Universe by Cary and Michael Huang. This version has an interactive slider and lets you scroll through the zoom levels yourself.

"This is an unprecedented finding. Previously, the best existing treatment for Alzheimer's disease in mice required several months to reduce plaque in the brain."

Three US citizens who lost their sight in childhood have reported a dramatic improvement in vision after having gene therapy in both eyes.

Zebra stripes evolved to keep biting flies at bay

America and Eurasia will crash into each other over the North Pole in 50-200 million years time, according to scientists at Yale University.

"It is as if it has just been blasted off Mars. It is effectively a pristine sample of Mars."

"Governments do not have the authority to say what marriage is or to change its nature or to decree that people of the same sex can marry."

Physicists have confirmed the ultimate speed limit for the packets of light called photons - making time travel even less likely than thought.

"The fact that I have had thousands of messages from around the world speaks for itself about the impact and the way people feel," he said.

A Jewish rabbinical court condemned to death by stoning a stray dog it feared was the reincarnation of a lawyer who insulted its judges, reports say.