Islamic scientists developed Algebra.
They built the first observatory.
They introduced the modern day Hindu-Arabic numeral system.
200 miles, I am sure that this is the correct answer.
There was the creation of the state department of homeland security!!
Answer: The Black Plague was a pandemic through out Europe that lasted from 1346-1353 and killed 25 million people. The positive effect it had for poor people was an end to feudalism and increased wages and innovation.
Explanation:
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Answer:
Alfred Russel Wallace (1823-1913) was a man of many talents - an explorer, collector, naturalist, geographer, anthropologist and political commentator. Most famously, he had the revolutionary idea of evolution by natural selection entirely independently of Charles Darw