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I wish HN had a "wow" button. Simply upvoting a submission like this one seems... inadequate.

• Cushman 15y ago
  Context: GelSight can register “physical features less than a micrometer in depth and about two micrometers across,” which means it can create a 3D image of ink on a piece of paper (below): Below that there is a 3D image of ink on a piece of paper. Taken with a handheld device. "Wow" about covers it, although I might go with "WOW."
• Hyena 15y ago
  That's an awesome idea. Perhaps it could kick in at a karma level.