most vegetables are just different kinds of broccoli
Explain
broccoli, cabbage, kohlrabi, kale, brussel sprouts, collard greens, savoy, and cauliflower are all the same species of plant, Brassica oleracea
most veggies is the same
But wait, there’s more!
Brassical oleracea, cabbage and so on, hybridizes with B. rapa, turnip and Chinese cabbage, to make B. napus, rutabaga and rapeseed. It also hybridizes with B. nigra, black mustard, to form B. carinata, Ethiopian mustard. And B. rapa and B. nigra hybridize together to form B. juncea, Indian mustard.
Together these relationships make up the fantastic Triangle of U!
And why it it called the Triangle of U? Because of this awesome guy, botanist
Working in Japan in the 1930s and using his Japanized name of
U Nagaharu, he analyzed the evolutionary history of the six species through careful breeding techniques. “Woo made synthetic hybrids between the diploid and tetraploid species and examined how the chromosomes paired in the resulting triploids” (Wikipedia). This theory of hybrid origin, named the Triangle of U in his honor, has since been confirmed by genetic analysis.
If you set out to create every-which-way hybrids out of three congeneric species, and make sure that they were still all tasty, they would call you mad! Mad! But Woo proved that nature is even more of a mad scientist than a human could ever be.