The desert located in nothern africa is the largest desert in the world

What was istanbul called before he ottomans conquered the city in the 15th century

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a.light in water b.light in vacuum c.sound in air. d. sound in water