Why don't scientists trust atoms?

Because they make up everything! 🤣 

Why did the tomato turn red?

🤣

Because it saw the salad dressing!

Why did the optimistic robot fall down the stairs?

He thought he could. 🤣 

Why did the bicycle fall over?

Because it was two tired!

This joke is funny because it is a pun on the word "tired." The bicycle is literally tired, but it is also exhausted. The joke is also inspirational because it teaches us that we should not give up when we are tired. We should keep going even when we are feeling exhausted, because we can achieve anything we set our minds to.