Altitude of Dead Sea, Death Valley, 11(60)
Bering glacier, 89(41)
Bermuda Triangle, 64(46)
Charleston (velocity of point), 258(52)
Distance from Alaska to Russia, 261(91)
Distance to horizon, 29(54), 71(43, 44), 417(44), 508(40)
Distance from Miami to Panama Canal, 257(18)
Earthquake intensity, 376(42), 620(114)
Earth’s crust, 488(39)
Earth’s radius, 71(47), 510(16)
Easter Island area, 75()
Grand Canyon, 132(13)
Hours of daylight, 322(83, 84)
Jurassic geological period, 475(58)
Ocean areas, 503(52)
Ocean tides, 305(42), 563(52)
Richter scale for earthquakes, 388(41)
San Francisco earthquake (1906), 388(42), 395(57, 58)
Seismic waves, 49(34), 583(66)