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  1. Resolution scales with wavelength over diameter, and radio waves are vastly longer than light.

  2. The shortest way looks wrong

    On a Mercator chart the shortest route is a curve and the wrong one is a straight line.

  3. Air that nobody has breathed

    An ice core is a column of old atmosphere held in bubbles.

  4. Twice a day, on the same two hours worldwide, hundreds of balloons carry a small box to the edge of the stratosphere.

  5. The pen that does not move

    A seismograph does not record the earthquake.

  6. The Bathysphere had no propulsion and no way home except the winch above it.

  7. The tower that lets go

    A service tower holds a fuelled rocket upright, feeds it, chills it, then lets go of every connection in under a second.

  8. A first-order lens stands eight feet tall and bends one lamp into a flat beam.