My first four letters describe all living things. My last five letters are another word for knight. My job is to save you, and I’m a fan of water. Who am I?

What ancient device allows people to traverse through walls?

How do trees surf the internet?

What is a surgeons' favorite game?

What did the panda ghost say?

I am the opposite of eat, I am savory and sweet. I am a treat, yet still a drink. What am I?

I am as light as a feather, yet the strongest of men cannot hold me for more than a minute. I am with you from the day you are born to the day you die. I can be as putrid as onions and garlic, yet as pleasant as freshly picked roses. What am I?

I take months to build, seconds to destroy, and years to rebuild. What am I?

How can you tell if reindeer have passed on your roof?

What do you call dental X-rays?