National Geographic


Exploration Into the Alien Deep

Educational Resources Created from the Alien Deep Series

Audience versions of this page: Families

  • Plankton Revealed

    These Microorganisms Play a Role in Ocean Health

  • Science of Surfline

    Website Predicts Where to Catch the Best Waves

    Surfline's forecasts have helped surfers discover new surf areas, such as the islands of Fiji and the many islands of Indonesia. Here, professional surfer Wayan "Gobleg" Suyadnya rides a wave in his native Bali, Indonesia.
  • Hydrothermal Vents

    More Than Just Hot Water

  • Alien Deep Series

    Photos and Videos From the National Geographic Channel

    Off Big Island, Hawaii: The Pisces IV sub explores a ridge dotted with Iridogorgia, a kind of octocoral. (Photo Credit: Woods Hole Oceanographic Institution)

National Geographic Channel’s Alien Deep is a five-part series that gives viewers an inside look at modern ocean exploration and recent discoveries. Viewers embark on expeditions with Dr. Robert Ballard as he explores geological secrets hidden in the depths of the ocean. Watch Ballard scour the seafloor of the Mediterranean Sea and the Black Sea in search of shipwrecks that offer insight into the lives of ancient mariners.

Ancient Exploration

Ancient Mariners of the Mediterranean

With 95 percent of the seafloor not yet explored, oceanographers and maritime archaeologists look to the deep waters of the Mediterranean and Aegean seas for shipwrecks that can be used to tell the story of ancient civilizations throughout the region. 

Ancient Shipwrecks of the Black Sea

Due to very low levels of oxygen at shallow depths, Black Sea shipwrecks are well preserved when compared to other Mediterranean wrecks from the same time period. Oceanographers and maritime archaeologists look to the waters of the Black Sea for shipwrecks that can be used to uncover the history and culture of ancient civilizations throughout the region. 

First Rulers of the Mediterranean

The ancient Phoenicians built a maritime civilization around the Mediterranean Sea.

This material is based in part upon work supported by the National Science Foundation under Grant No. DRL-1114251. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation.


Alien Deep Interactive

Explore the Floors of Our Ocean Planet

Take a voyage via submersible across our planet's largely unexplored ocean floors. Investigate the many mysteries of the sea, including underwater volcanoes and centuries-old shipwrecks.

Ocean Exploration

Did you know that 98% of the ocean remains unexplored?

Meet the Experts

Ocean Explorer Robert Ballard

Dr. Robert Ballard is an ocean explorer who has discovered shipwrecks (including the R.M.S. Titanic!) as well as the weird world of hydrothermal vents.

Bioengineer: Kakani Katija

Kakani Katija is an ocean-focused bioengineer and National Geographic Emerging Explorer.

Oceanographer Sylvia Earle

Profile of Dr. Sylvia Earle, an oceanographer and National Geographic Explorer-in-Residence.

Ocean Explorer Michael Lombardi

Michael Lombardi explains his deep-diving work and offers suggestions to students who hope to pursue a career in ocean exploration.

Deep-Sea Submersible Pilot Erika Bergman

Erika Bergman is taking citizen science to a new level by inviting students to participate in her expeditions through video chats.