299K views · 9.1K reactions | Phil and Heather gather witnesses who have seen the Hessdalen lights for themselves.  See if they can uncover this mysterious phenomenon on #ExpeditionX, tonight at 9P on Discovery. | Expedition Unknown | Facebook

32K views · 748 reactions | No gravity? No problem! Joshua Gates' latest adventure is one you don't want to miss! ✈️ New episodes of #JoshGatesTonight air Wednesdays at 8p on Discovery. | Expedition Unknown | Facebook

29K views · 1.1K reactions | Did King Tut’s tomb curse these men, or is there a scientific explanation for their early deaths? Watch new episodes of #ExpeditionFiles with Joshua Gates Wednesdays at 9p on Discovery. | Expedition Unknown | Facebook

Norway's ice-cold Hessdalen Valley is one of the hottest spots for UFO activity in the world. 🛸👀 Phil and Heather are making the trek to learn more on #ExpeditionX, Wednesday at 9P on Discovery. | Expedition Unknown

🚂 Polar Bears & Rails | Northward Expedition | Behind-The-Scenes! ❄️ Adventure meets wildlife! See polar bears and trains like never before. #TrainAdventures #PolarBear #Exclusive #BehindTheScenes #INSANE #MustSee #NorthConwayNh | Gilligan Matt