Astronomers and other scientists constantly research and explore space. One of the most intriguing questions they hope to answer one day is whether life exists on other planets. Despite a lot of research in outer space, scientists have not yet been able to find evidence of life forms on any other planet other than Earth.

Earth is very hospitable, which makes living here easy. Earth has water, which living creatures need to survive.

Earth also has an atmosphere that is neither too hot, nor too cold. Its distance from the sun provides Earth’s inhabitants with the proper amount of warmth, sunlight and energy.

Although there may be other planets that have some of Earth’s hospitable features, so far scientists have not found any with all of the features they believe necessary to sustain life. Earth remains one of a kind!


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    • What a great question, Mark! We are so proud of all the WONDERing you have been doing! While we can’t be certain about life on Mars, we are having a great time exploring and learning about all the evidence that has been found! What do you think? :)

  1. I think there are aliens, but I think they’re going on with their lives and not too worried about us as humans invading them. They are definitely not interested in probing us. Let it go, we may find them some day. Stop worrying about them invading us. THEY’RE NOT GOING TO!

  2. The universe is way too large for us to be the only life form out there. But due to the vast distances and space we will most likely never have any communication with another being.

    • We don’t know if we would want to see them or not, Cardarrell. They could be scary! Thanks for WONDERing with us today! :-)

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Have you ever wondered…

  • Is there life on other planets?
  • What must a planet have in order to sustain life?
  • What would you want an alien life form to know about Earth?

Wonder Gallery

Try It Out

Imagine astronomers have discovered friendly beings on a distant planet called Wondertron. They would like to send a “welcome package” from Earth to the residents of Wondertron, and you have been recruited as a representative of America to help decide what to send.

The welcome package should include:

  • Three items that represent modern life in America
  • Three news stories about important moments in American history
  • Three foods that represent American culture
  • Three miscellaneous items of your choice
  • Three descriptions of unique Earthling habits (examples: birthday parties, spelling bees, having pets, collecting seashells, dancing, parades, building snowmen)

What would your welcome package contain? Write a brief description of what you would send to the aliens of Wondertron.

Since you can’t send a package to Wondertron, instead email your description or send a copy to Wonderopolis:

Wonderopolis HQ
325 West Main Street, Suite 300
Louisville, KY 40202-4237


Still Wondering

Have you ever wondered why the moon appears to change shape over time? Explore moon phases with a simple experiment you can do at home using Science NetLinks’ By the Light of the Moon resource.


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Wonder What’s Next?

Strike up the band! Wonderopolis is alive with the sound of music! Tomorrow we’ll be making beautiful music together as we take a seat with the orchestra and find out what all the noise is about.

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