Our Answers to the Most Burning Questions of 2014

Here are the ten most popular installments of “Ask Smithsonian” this year

(Images courtesy of Smithsonian Digital Studio)

Ask Smithsonian video host Eric Schulze takes questions from our readers and answers them weekly in a series of one-minute videos. This year, we investigated the answers to everything from "What's up with willpower and why don't I have it?" to "Can cats really make rats into zombies?" Check out the top ten most popular questions of 2014 below. Have one in mind for 2015? Ask us!

1) Why don't people smile in old photographs?

Why saying cheese just didnt happen in the early days of photography.

2) What's a stone baby?

Prepare to be amazed.

3) How do dolphins sleep without drowning?

Not to worryshut-eye comes easily to these aquatic mammals

4) Does the five-second rule really work?

You might think twice about picking that chip off the carpet and putting it into your mouth.

5) How did King Tut die?

It was no doubt a fantastical death, worthy of a pharaoh

6) Why were prehistoric animals so big?

Our giant of a host, Eric Schulze, explains why size mattered in prehistory.

7) Where does space begin?

Watch to get the answer that surprised the heck out of us

8) Do animals laugh?

The answer may lie between being ticklish and having a sense of humor. (Still Image: Kristian Bell)

9) Why do songs get stuck in my head?

The science behind earworms and why they wont leave us alone

10) Why are lakes freshwater and oceans saltwater?

Erosion, evaporation, and a leaky faucet, our host Eric Schulze breaks it all down.

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