Mongol relay couriers Pony Express daily distance

Mongol messengers crossed vast distances by constantly changing horses

The Mongol Empire maintained a relay network of stations stocked with fresh horses and supplies. Official messengers could ride from station to station without waiting for one exhausted horse to recover. Under favorable conditions, this allowed messages to travel extraordinary distances in a single day, helping rulers coordinate an empire stretching across Eurasia.

New antibiotic classes nearly stopped appearing

After a prolific period of antibiotic discovery from the 1950s through the 1970s, the development of entirely new classes nearly stopped. This happened while bacterial resistance continued to evolve and antibiotic misuse persisted.

Hands-free phone calls distract drivers too

Drivers perform worse while talking on a phone whether they hold it or use a hands-free system. This suggests that much of the danger comes from the mental work of having the conversation, not simply from holding the phone.

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Mongol relay couriers Pony Express daily distance

Mongol messengers crossed vast distances by constantly changing horses

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