What an interesting thread.
Is/are North and South American one continent (the IOC approves) or two? Did they become two continents when the Panama Canal was dug to separate them.
They were definitely separate continents long before the Panama Canal came along. When the original single continent Pangaea split into two, what is now North America became part of Laurasia (along with Europe and Asia), while what is now South America became part of Gondwana (along with Africa, Antarctica, Australasia, the Indian sub-continent, and the Arabian Peninsula). But after those continents split up, South America and North America crashed into each other.
Is there any geological reason to regard Europe and Asia as two separate continents? I am pretty sure that this is just a man-made cultural/historical convention.
It's purely an artificial division. Europe and Asia have always been a single land mass.
IIndia is jammed into the bottom of Eurasia, but the indian continental shelf is not the continental shelf of Eurasia. India crashed into Eurasia 50 million years ago and pushed up the Himalayan Mountains between them -- surely a more "continent defining landmark," geologically speaking, than the border betwee Europe and Asia.
I would also agree with you on this one.
The thing is, the Indian sub-continent is not the only sub-continent. The Arabian Peninsula is a sub-continent as well. And the eastern part of Africa is in the process of breaking away from the rest of the continent to form another sub-continent.
If you give one of them full continent status, you have to give them all full continent status.
When you think of continents, you think of vast land masses. Are the sub-continents big enough to be thought of in the same way as the traditional continents? Probably not.
This was the same dilemma that was faced in space when people complained that Pluto was classed as a planet, yet there were moons and other objects in the Solar System that were bigger than Pluto. So, rather than promoting all these objects and making it impossible to fit them all into a rhyme, they demoted poor Pluto and put it and all these other objects into a new category, drawf planet. Which messed up the rhyme I was taught at school:
My | Very | Energetic | Mother | Just | Served | Us | Nine | Pizzas |
Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | Pluto |
Sorry,
@elektra blue, we weren't told whether or not there was any

pineapple on the pizzas. But, it doesn't really matter now.
Anyway, coming back down to Earth, rather than promoting sub-continents, what should be done is to increase awareness of them. Make them as well known as the traditional continents.
And make a rhyme for them!
CaroLiza_fan