Scientists have demonstrated the ability to scale-up an 'uncrackable' computer encryption system that utilizes quantum physics to ensure security.
The technique is based on information that is carried by photons, the basic particles of light. While it's been demonstrated on a small scale, the team headed by Andrew Shields and publishing in Nature says they've shown that up to 64 users can share a single photon detector, eliminating the need for each one to have such an (expensive) device.
The Space Fence is down. That's the message we get from the SatWatch site, following up on our report last month that the U.S. Air Force was poised to shut down the radar system that tracks thousands of objects orbiting Earth. It had been in operation since 1961.
Dave Vesely is busy training his dog, Sharpy. She isn't learning to sit or fetch or even herd sheep; Sharpy is learning to find the nests of western pond turtles.
These turtles are sneaky. After laying their eggs in a small hole, they knead together dirt, leaves and their own urine to plug the opening. Once this mud dries, the nest looks like an unremarkable patch of ground.
Being a wildlife biologist in the 21st century increasingly means rescuing rare animals from extinction. Among the success stories is the whooping crane. Seventy years ago there were only about 16 birds left on the planet. Now there are about 600.