Earth's magnetic field protects us from the powerful Solar Wind and it is also essential for the use of compasses (if anybody actually uses them anymore).
I hope this helps! :)
In ancient history we can only study their cultures. This is because they didn't always have written records (or the records they did leave has been destroyed or damaged) hence no way to transmit their information. We have to guess on their everyday lives based on statues and art forms they left behind.
Decided in the case "Brown V. Board of Education of Topeka," the notion of "separate but equal" was no longer acceptable because this notion is inherently unequal. By segregating schools based on race, a divide between the races was produced. Specifically, black school children, even in schools that were "materially equal," had more issues of feeling inferior to whites and being looked down upon by them. This violated the 14th Amendment's Equal Protection Claus.
<span>the idea that the plans are reuniting the nation without resolving the fundamental conflicts at the root of the division between North and South</span>