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Drought exposes remains of ancient Roman bridge in the Tiber river in Rome

The Tiber is at a historic low, and near Castel Sant’Angelo, the pillars of what was once a Neronian bridge, dating from the early centuries AD, have re-emerged.

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More in Science

Why parabolas are crucial to cryptography

Cryptographers use points along a curve to crack especially tough codes

  • Quadratic functions, including parabolas, are unexpectedly used in cryptography.
  • Parabolas help visualize multiplication through a parabola calculator method.
  • Elliptic curve cryptography offers a more efficient and secure alternative to RSA.

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