• Schedule
  • Mobile Apps
  • Watch Live
  • Stream on discovery+
  • Shows
    • Main
    • Program Guide
    • Watch Live
    Shows
    • The Dead Files
    • Destination Fear
    • Expedition Bigfoot
    • Ghost Adventures
    • Ghost Brothers
    • Ghost Nation
    • The Holzer Files
    • Kindred Spirits
    • Mountain Monsters
    • Paranormal Caught on Camera
    • Portals to Hell
    Hosts
    • Amy Allan
    • Amy Bruni and Adam Berry
    • Destination Fear Team
    • Don Wildman
    • Ghost Adventures Crew
    • Ghost Nation
    • The Holzer Files Team
    • Jack Osbourne and Katrina Weidman
    • Steve Dischiavi
    New Series
    • Believers
    • Haunting in the Heartland
    • Hotel Paranormal
    • Paranormal 911
    • My Paranormal Nightmare
    • Mummy Mysteries
    Trending
    • Haunted
    • Ghost Adventures
    • Ghost Nation
    • Shows
  • Video
    • All Videos
    • Watch Live TV
    Top Videos
    • Tips for Solo Travelers
    • 4 Gorgeous Waterfalls
    • 5 Extreme Swings
    • World's 10 Best Swimming Holes
    • Best BBQ in America
    • Tilt! at 360 Chicago
    Digital Exclusives
    • Big City, Little Budget: New York
    • Big City, Little Budget: San Francisco
    • Bizarre Foods in the Kitchen
    • Man V. NYC
    • One Bag and You're Out
    • Outlandish
    From Our Shows
    • Bizarre Foods
    • Bizarre Foods: Delicious Destinations
    • Booze Traveler
    • The Dead Files
    • Expedition Unknown
    • Ghost Adventures
    • Hotel Impossible
    • Mysteries at the Museum
    Trending
    • Haunted
    • Ghost Adventures
    • Ghost Nation
    • Shows
  • Destinations
    Top Domestic
    • Boston
    • California
    • Charleston
    • Florida
    • Hawaii
    • Las Vegas
    • New Orleans
    • New York City
    • Washington, DC
    Top International
    • Barcelona
    • Caribbean
    • Costa Rica
    • Dubai
    • Greece
    • Japan
    • London
    • Paris
    • Rome
    Trending
    • Alaska
    • Cancun
    • Iceland
    • Jamaica
    • Myrtle Beach
    • Nashville
    • Niagara Falls
    • San Antonio
    • Vancouver
    Explore By Region
    • Asia Pacific
    • Caribbean
    • Europe
    • Middle East & Africa
    • North America
    • South & Central America
    Trending
    • Haunted
    • Ghost Adventures
    • Ghost Nation
    • Shows
  • Interests
    Top Interests
    • Amusement Parks
    • Arts and Culture
    • Beaches
    • Food and Wine
    • National Parks
    • Tailgating
    By Trip
    • Cruises
    • Health and Wellness
    • Honeymoons
    • Long Weekends
    • Outdoor Adventure
    • Road Trips
    By Traveler
    • Family Travel
    • Girls' Getaways
    • Guy Trips
    • LGBT Travel
    • Solo Travel
    Travel Tips
    • Budget Tips
    • Gear and Gadgets
    • Hotels and Lodging
    • Plan Your Bucket List
    • Savvy Traveler
    Trending
    • Haunted
    • Ghost Adventures
    • Ghost Nation
    • Shows
  • Sweepstakes
  • Pinterest
  • Facebook
  • Twitter
  • Email

Are We Alone in the Universe?

01:00

Josh Gates travels around the globe looking for signs of alien life.

Get more

Related Videos

Alone in the Dark 01:03

Alone in the Dark 01:00

Alone in the Night 01:34

Walking Alone in the Congo 02:18

Alone on the Third Floor 00:52

Not Alone 00:44

We're Never Alone 00:57

Never Alone Recap 04:50

More Videos

Recalibrating the Way We Think 02:44

I Won't Go in the House Alone 01:52

Left Alone at Night 02:23

Broke, Alone and Insane 02:22

Not Alone Out Here 01:00

You're Never Alone Here 00:30

Afraid to be Alone 02:17

Afraid to be Alone 02:16

We Call Him the Shadow Man 01:41

The Reason We Do These Events 01:43

Why We Love the Florida Keys 01:00

Adventures You Shouldn’t Have Alone 01:34

Locked Alone in a Haunted Room 01:51

I Don't Like Being Here Alone 02:31

Why We Love Jamaica 01:01

Why We Love Nashville 01:00

We Recommend

10 Over-the-Top Hotel Amenities We Can't Live Without 10 Photos

8 Things We Know About the Mysterious Yeti

We Found the Loch Ness Monster (Everywhere)

10 Things We Learned From the Ghost Adventures Comic Con Panel

What We Know About the Manhattan Project

The Vacations We Wish Santa Would Bring Us 9 Photos

More From Travel

  • Sweepstakes
  • Travel's Best
  • Stream Travel Channel
  • Ways to Watch Travel Channel

Travel Channel Family

HGTV

<p><span data-sheets-value=

35 Before-and-After Backyard Transformations

Great American Country

  • Upcycled Garden Decor
  • National Parks IQ Quiz
  • Top 20 Road Trip Songs

Food Network

  • 35 Ways to Use Up Leftover Ham
  • Brunch Recipes Everyone Will Love
  • 60 Ways to Cook Asparagus

DIY Network

  • 35 Front Porch Decor Ideas
  • 15 DIY Bathroom Projects
  • Low-Cost Gardening Tips
  • Help
  • Advertise
  • About
  • AdChoices
  • Privacy Notice
  • Visitor Agreement
  • Site Map
  • TV Ratings
  • Online Closed Captioning
  • California Privacy Notice
  • CA Do Not Sell My Info
  • Discovery, Inc.
  • The Discovery Family of Networks
    • HGTV.com
    • DIY Network
    • Food Network
    • Cooking Channel
    • Food.com
  • © 2021 Discovery or its subsidiaries and affiliates. All rights reserved.