Floating in mid-air, inspired by traditional designs, or built out of carbon dioxide, the sky is indeed the limit in the annual eVolo Skyscraper Competition. Since eVolo first launched the contest in 2006, there's no question that the 2016 edition will be just as competitive.

Every year, participants worldwide are invited to reinvent the skyscraper: examining its definition, historical context, purpose, and exploring the potential for vertical living in the 21st century. The fun part is that entrants are given complete freedom in designing their skyscrapers.

Get a headstart on those submissions! You can sign up for early registration now until November 17, 2015 for $95. Then from November 18 until January 19, the registration fee will hike up to $135.

The final registration deadline is January 19, 2016. Submissions are due on January 26, 2016 at 11:59 p.m. US Eastern Time.

This year's jury features: Matias del Campo, Thom Faulders, Greg Lynn, Marcelo Spina, and Skylar Tibbits.

Here's a throwback to the 2015 winning submissions:

2015 1st prize - "Essence Skyscraper" by BOMP (Ewa Odyjas, Agnieszka Morga, Konrad Basan, and Jakub Pudo) | Poland

2015 2nd prize - "Shanty-Scaper" by Suraksha Bhatla and Sharan Sundar | India

2015 3rd prize - "Cybertopia" by Egor Orlov | Russia

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