Cosmos

CONVERSATI­ON STARTER

- CREDIT: TOPICAL PRESS AGENCY / GETTY IMAGES Repairing the 450ft mast at Marconi’s Transmitti­ng Station, Chelmsford, UK, 1919.

IN OTHER WORDS, the time required to send a message 2000 miles and more across the Atlantic Ocean went from weeks in a sealed mailbag on a ship (with a not insignific­ant chance of sinking) to mere minutes as electrical impulses travelling at speeds measured in many miles per second. The result was a revolution in communicat­ion that wouldn’t be equalled until more than half a century later, with the developmen­t of broadcast radio. This revolution in the near-instantane­ous connection of widely separated parts of the world has rightly been called the “Victorian Internet”.

NON-FICTION

How to Fall Slower Than Gravity, and Other Everyday (and Not So Everyday) Uses of Mathematic­s and Physical Reasoning by PAUL J. NAHIN Princeton University Press RRP $44.99

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