Brain Exchange: And Other Cosmic Tales

These are stories which are imaginations of the author and have a blend of Science Fiction, Mythology and Fun. 
1. What happens when two parrots get brains of humans. How does it create havoc on the earth and can this chaos be controlled.
2. In pursuit to save the mankind from extinction one scientist discovers a planet which is suitable for human habitation. How did they ascertain it suitability and does it solve the problem?
3. Humorous encounter of a person with Yamraj, when he goes to buy and electric vehicle.
4. When a person dies how does he discover the working of whole system, including that of rebirth. What does he use this knowledge for?