Can a person fly?

There is a big contention on flying a person like a bird. Is this possible? Someone says “YES” and someone says “NO”. If possible then how it would achieve? For this we have to see how bird flies and then we would target to explore the concept.

Logically, when a bird flaps its wings, air is pushed downward. According to Newton’s 3^rd law, this produces an opposite force that “lifts” the bird into the air. Since a bird’s body structure and specially its wing is in the shape of an airfoil, and hence it produces some lift even when the bird is just gliding.

But there are some birds like as penguins and ostriches that are not able to fly. What are the reasons? Is it same as human being? We will discuss later.