Simplify the following text for a Grade 14 native English-speaking person.
Original: Gondwana included most of the landmasses in today 's Southern Hemisphere , including Antarctica , South America , Africa , Madagascar and the Australian continent , as well as the Arabian Peninsula and the Indian subcontinent , which have now moved entirely into the Northern Hemisphere .
Simplified: While the northern hemisphere continent Laurasia moved further north , Gondwana drifted south . It included most of the landmasses in today 's southern hemisphere , including Antarctica , South America , Africa , Madagascar , Australiaâ `` New Guinea , and New Zealand , as well as Arabia and the Indian subcontinent , which have now moved entirely into the Northern Hemisphere .