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Photo-induced phase transition (PIPT) has caused great excitement in materials science because ultra-fast alteration of the magnetic, dielectric, structural and optical properties of materials can be brought about with very weak photonic excitation as a result of cooperative interactions. An essential question that arises is how we can identify a novel phase of solid that is uniquely generated under photo-excited conditions.

A joke among researchers in the field of male contraception is that a clinically approved alternative to condoms or vasectomy has been five to 10 years away for the past 40 years.

By Barbara Casassus of Nature magazine Variable energy sources such as wind and solar power could provide 19-63% of required electricity in many countries if the technical and market hurdles are overcome, according to the International Energy Agency (IEA). [More]