I think you need to consider what you mean by "discovered". When Australia was "discovered" by assorted navigators, starting in 1606, when they began mapping it, there had been people living there for at least 40,000 years and maybe 60,000 years. Do you think they needed to be discovered? The only continent that was truly discovered in historic times was Antarctica.
There isn't a reason for it...it just was!
Africa and and Asia i think XD
Wegener hypothesized that, on earth, there was only one continent called Pangea, but it split into the continents we have now.Improved Another Answer:Wegener's hypothesis was that long 225 million years ago, there was a supercontinent called Pangaea (All the continents were all together).Wegener saw that South America and Africa looked like they could fit together like puzzle pieces. He then found that there were fossils of animals in a warm climate and it was also in a very cold climate. He thought, "How could that be? The animal couldn't have lived in two different kinds of climates and how could it have swam across the sea?!"
The same rocks and minerals from the same batch, dinosaur fossils dating back to the same time periods, natural landforms and structures can be found on completely separate continents. This evidence supports the Plate Techtonics and Continental Drift theories.
Many parts of Asia(especially South East Asia and East Asia) Southern AfricaMiddle EastEuropeCaribbeanAustraliaAmerica
There are no continents in Asia. Asia is a continent
The Americas were discovered by Christopher Columbus. However, he believed these places were Asia. It was Amerigo Vespucci who pointed out that these were separate continents.
There is no continents in Asia because Asia is a continent
Asia is one continent, so there are no continents in it.
Russia occupies the continents of Asia and Europe. The two continents are also referred to as Eurasia.
The three continents are Europe, Asia and Africa.
Turkey is partly on continents Asia and Europe,not Africa.