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(PhysOrg.com) -- New research from the University of Bristol may disprove a long-standing conjecture made by one of the founders of quantum information science: that quantum states featuring ‘positive partial transpose’, a particular symmetry under time-reversal, can never lead to nonlocality.

The Dog-Bark Snake Bot You've probably heard of robot snakes before, useful in search-and-rescue scenarios because they can worm their way into confined spaces--perhaps in collapsed buildings--that other machines can't match. You may also know SAR teams sometimes use sniffer dogs to help them locate victims trapped in rubble. But you've probably never conflated these two notions, and pictured a SAR dog that has a slave snake-bot that it can deploy and control with a bark.

The fundamental resource that drives a quantum computer is entanglement—the connection between two distant particles which Einstein famously called 'spooky action at a distance'.

Renowned Parisian H

Renowned Parisian H

There may be nothing new under the sun, but beneath the sea is a different story. Scientists studying 28 years of data from the Atlantic Ocean have found that climate change is causing drastic changes in fish populations off the European coast--and that's bad news for cold-loving species like cod, which have fed generations of Northern Europeans. The North Sea, a cold wind-swept patch of the Atlantic stretching from Scandinavia to the U.K., is warming four times faster than the global average.

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Professor Jeremy O'Brien, Director of the University of Bristol's Centre for Quantum Photonics, and his Japanese colleagues have demonstrated a quantum logic gate acting on four particles of light -- photons. The researchers believe their device could provide important routes to new quantum technologies, including secure communication, precision measurement, and ultimately a quantum computer -- a powerful type of computer that uses quantum bits (qubits) rather than the conventional bits used in today's computers.

Pop-Up Magazine, the brainchild of journalist (and Fast Company contributor) Douglas McGray, expands this week by collaborating with ESPN: The Magazine.

CBSNews.com's Ken Lombardi speaks with Bristol Palin in New York at the 10th anniversary of the Candies Foundation. Palin speaks about her anti-teen pregnancy campaign and describes some of the struggles she says she's faced as a single mother to son Tripp.

Optics researchers from the Universities of Glasgow and Bristol have developed an iPad application for accurate, easy and intuitive use of optical tweezers.

A research group led by scientists from the University of Bristol has demonstrated the quantum operation of new components that will enable compact circuits for future photonic quantum computers.

Publisher makes it official: Bristol Palin memoir, "Not Afraid of Life," will hit shelves this summer