International Travel

	%Comp	Index
Own passport	77.3%	131
Took foreign plane trip past 12 months	39.0%	168
Average # plane trips taken	2.5
Places visited outside the US - past three years
Europe	31.7%	181
Canada	26.4%	186
Mexico/Central America (net)	26.9%	139
Mexico	19.0%	109
Other Central/South America	12.9%	316
Caribbean/Bahamas/Bermuda (net)	18.0%	105
Middle East/Israel	3.3%
Africa	2.3%	174
Australia/New Zealand	2.8%	183
Asia	10.4%
Other international destination	2.5%
Travel expenditures past 12 months
Total travel expenditures
Spent $10,000+	29.0%	262
Average expenditure	$9,700	219
Personal Travel and Vacations outside the US
Average expenditure	$6,900	189
Average # night spent in hotel/motel past 12 months	16.1

Source: 2008 Ipsos Mendelsohn Natural History Subscriber Study. Indexes based on 2008 Mendelsohn Affluent Survey

Caves are among the predators’ favorite spots.

The brain doesn't much care whether an experience is real.

Humans will never win a sprint against your average quadruped. But our species is well-adapted for the marathon.

Hear author Xiaoming Wang interviewed by Vittorio Maestro, Editor in Chief of Natural History. (MP3, 17 minutes)