What document do travelers normally need to go between most countries?
AnswerA passport
A passport proves identity and citizenship when crossing international borders.
Travel · Facts & stats
Trip facts & stats
7 fact-checked facts about trips and travel, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is the tired, out-of-sync feeling after flying across many time zones called?
AnswerJet lag
Jet lag happens when the body clock is out of step with the local time at the destination.
Going deeper
What happens to the date when you cross the International Date Line traveling west?
AnswerIt moves forward one day
Crossing westward, for example from the Americas toward Asia, you skip ahead one calendar day.
What do airport codes like LAX and JFK consist of?
AnswerThree letters
Passenger airports are identified by three-letter IATA codes.
What was the Silk Road?
AnswerTrade routes linking China with the Mediterranean
For centuries the Silk Road carried silk, spices, ideas and travelers between East and West.
Expert level
The International Date Line roughly follows which line of longitude?
Answer180 degrees
The Date Line zigzags around islands but mostly follows the 180-degree meridian in the Pacific.
Which Venetian merchant's account of travels to Asia in the 1200s became famous in Europe?
AnswerMarco Polo
Marco Polo's book described his years in China and across Asia to European readers.
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