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Links to some recent technology stories written by me.
An interview with the head of a new US research center about freeform optics, which is a new name for an established idea whose time might have come.
Why photodynamic therapy still seems to have trouble leaving the starting gate.
A way to examine biological cells without technically needing a magnifying lens (though you still need a lot of kit).
Building a confocal laser system into an endoscope makes it better at spotting cancer than just an old-fashioned endoscope; but the concept of optical biopsies still faces some hurdles.