The new species come from old ancestors of the animals that were there, over time they slowly evolved, and they adapted to that new environment.
Melanin conveys some UV protection
In observing, we have our 5 senses (smell, taste, touch, see, hear) meaning scientists uses their 5 senses to be able to have a prediction or a hypothesis about the problem.
Answer:
The continents were once connected as one landmass.
Explanation:
This did happen it's called Pangea. There were similar fossil records in different continents.
