Once there was a student who was sent by his teacher to participate in a trivia contest. Upon entering the examination room, the judges asked:
– Can you tell us who invented the rabies vaccine?
The student awkwardly replied:
– Edison, sir!
The judges continued to question him:
– Do ghosts exist in this world?
The student said:
– Scientists are researching that, sir!
The judges decided to send the student back to his class. When he returned, the teacher wanted to see how he performed in the contest and asked:
– What did Edison invent?
The student thought the teacher was joking and cheerfully answered:
– The rabies vaccine, ma’am!
The teacher was infuriated by her student’s poor performance and asked:
– Are you crazy?
The student, thinking the teacher was repeating the previous question, happily replied:
– The scientists are researching that, ma’am.
The teacher exclaimed:
– Oh, so you’re an alien then. 
This article was submitted by Lê Hồ Hải to www.khoahoc.tv
