Why are most of the continents wider at the top/north and narrower further south?

Question

Is this purely a coincidence or is there some sort of geological explanation for it? North America, South America, Africa, Asia, all have this general shape. Even Australia to a smaller extent has a narrowing southeastern area.

In: 3

Answer 1

Almost certainly coincidence. If you can find a reason I’m willing to listen. A sample size of 6 (I’m assuming we couldn’t make a statement about Antarctica which straddles the southermost position) makes it fairly difficult to assert a non-random hypothesis.