tinued exponential
growth in science and technology raises both hopes (e.g., advances
in medicine) and fears (e.g., development of even more lethal
weapons of war).

Geography World

Map references:
Physical Map of the World, Political Map of the World, Standard
Time Zones of the World

Area:
total: 510.072 million sq km
water: 361.132 million sq km
land: 148.94 million sq km
note: 70.8% of the world's surface is water, 29.2% is land

Area - comparative:
land area about 16 times the size of the US

Land boundaries:
the land boundaries in the world total 250,472 km (not counting
shared boundaries twice); two nations, China and Russia, each border
14 other countries
note: 43 nations and other areas are landlocked, these include:
Afghanistan, Andorra, Armenia, Austria, Azerbaijan, Belarus, Bhutan,
Bolivia, Botswana, Burkina Faso, Burundi, Central African Republic,
Chad, Czech Republic, Ethiopia, Holy See (Vatican City), Hungary,
Kazakhstan, Kyrgyzstan, Laos, Lesotho, Liechtenstein, Luxembourg,
Malawi, Mali, Moldova, Mongolia, Nepal, Niger, Paraguay, Rwanda, San
Marino, Slovakia, Swaziland, Switzerland, Tajikistan, The Former
Yugoslav Republic of Macedonia, Turkmenistan, Uganda, Uzbekistan,
West Bank, Zambia, Zimbabwe; two of these, Liechtenstein and
Uzbekistan, are doubly landlocked

Coastline:
356,000 km
note: 98 nations and other entities are islands that border no other
countries, they include: American Samoa, Anguilla, Antigua and
Barbuda, Aruba, Ashmore and Cartier Islands, The Bahamas, Bahrain,
Baker Island, Barbados, Bassas da India, Bermuda, Bouvet Island,
British Indian Ocean Territory, British Virgin Islands, Cape Verde,
Cayman Islands, Christmas Island, Clipperton Island, Cocos (Keeling)
Islands, Comoros, Cook Islands, Coral Sea Islands, Cuba, Cyprus,
Dominica, Europa Island, Falkland Islands (Islas Malvinas), Faroe
Islands, Fiji, French Polynesia, French Southern and Antarctic
Lands, Glorioso Islands, Greenland, Grenada, Guam, Guernsey, Heard
Island and McDonald Islands, Howland Island, Iceland, Jamaica, Jan
Mayen, Japan, Jarvis Island, Jersey, Johnston Atoll, Juan de Nova
Island, Kingman Reef, Kiribati, Madagascar, Maldives, Malta, Isle of
Man, Marshall Islands, Martinique, Mauritius, Mayotte, Federated
States of Micronesia, Midway Islands, Montserrat, Nauru, Navassa
Island, New Caledonia, New Zealand, Niue, Norfol