This is…not true. Medieval Europeans were well aware that the earth is round. Knowledge of a spherical earth was widely discussed as early as the 5th c BC. This knowledge came to medieval Europe through Aristotle.
Much of the controversy in medieval Europe was about the *size* of the globe, not its shape. Columbus studied the (widely available) calculations of Eratosthenes, from approx 240 BC. Columbus ended up doing his own calculations (which were stunningly wrong).
You know @eric_schmitt it would be best if you checked your facts before posting dumb ahistorical shit online. Any school library will have this information.

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More from @historianess

16 Feb
A thread about electricity deregulation and infrastructure in Texas: 1/
Dereg has been a thing there since we moved to Austin in the late 1980s. A constant push for lower electricity prices. TX is unique in that it has its own grid; the grid doesn't connect to any other states. So TX has a lot of leeway in what it decides to do. 2/
ERCOT is the state agency that "regulates" the grid and the "deregulated" "electricity market." What this means is that you can *buy* power from any number of companies, and regional power companies are responsible for maintaining the grid. 3/
Read 19 tweets

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