Physicists and medical researchers for the first time have demonstrated a new technique that non-invasively measures in real time the level of damage to the skin from sun exposure and aging, and initial results suggest that women's skin ages faster than men's.
We have to climb a mountain in order to conquer it. In quantum physics there is a different way - objects can reach the opposite side of a hill simply by tunnelling through it, instead of laboriously climbing over it.
A new type of diode laser, called the quantum cascade laser (QCL), may eventually change this situation. Diode lasers are inherently compact and suitable for mass-production, which has led to their widespread and low-cost use in everyday products, including CD and DVD players.
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