Astronomy:
A structure known as the African Stonehenge in present-day Kenya (constructed around 300 B.C.) was a remarkably accurate calendar. The Dogon people of Mali amassed a wealth of detailed astronomical observations. Many of their discoveries were so advanced that some modern scholars credit their discoveries instead to space aliens or unknown European travelers, even though the Dogon culture is steeped in ceremonial tradition centered on several space events. The Dogon knew of Saturn’s rings, Jupiter’s moons, the spiral structure of the Milky Way and the orbit of the Sirius star system. Hundreds of years ago, they plotted orbits in this system accurately through the year 1990 . They knew this system contained a primary star and a secondary star (now called Sirius B) of immense density and not visible to the naked eye.
Metallurgy and tools
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Many advances in metallurgy and tool making were made across the entirety of ancient Africa. These include steam engines, metal chisels and saws, copper and iron tools and weapons, nails, glue, carbon steel and bronze weapons and art
Answer:
a wide area of dry land located along the southern edge of the Sahara is the correct answer.
Answer:
the signs telling people not to buy from the store
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Explanation:
Anti-immigrant sentiment has also come from perceived competition over jobs. In the late 1800s, nativists believed that Chinese immigrants were undercutting U.S.-born workers, leading to violence and exclusionary legislation.
They discuss the start of the Korean War.
They demonstrate some degree of bias.
