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On umbrellas, springs, and superconductivity

Springs are usually metal wires wound in a spiral, allowing us to store mechanical energy; the umbrella’s rod consists of multiple cylinders, and the spring opens them up in succession; when you close an umbrella, you compress the spring and store energy in it

On umbrellas, springs, and superconductivity

We haven't written up this one. The Hindu - Sci-Tech has the full story — the link below goes straight to it.

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Amateur archeologist unearths Germany's largest trove of Roman coins

What began as a routine search in a field near Wesseling led to the discovery of nearly 1,000 Roman silver coins, one of the most significant archaeological finds in Germany in recent years.

  • 934 Roman silver coins, or denarii, excavated and displayed at LVR-LandesMuseum Bonn.
  • Coins likely buried during second quarter of 2nd century AD, owner's fate unknown.

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