Studying the human brain is difficult because of its vast and intricate network of neural connections. The fruit fly offers a simpler but similar model that researchers can more easily map.
Fighting for voter access is an inevitable part of any democracy, from ancient Rome to the US today. Roman legislators were able to thwart elite political sway by introducing written ballots.
Because hammerhead sharks give birth to live young, studying their embryonic development is much more complicated than harvesting some eggs and watching them develop in real time.
The iconic image of a witch on a broomstick has apocryphal origins. But whether they could actually fly didn’t stop Christian society from persecuting them.