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Was Abraham Lincoln dying of cancer when he was killed? NGC is on the front lines as scientists attempt to solve a genetic mystery using a piece of fabric stained with the presidents blood to run DNA analysis. The final year of Lincoln's life seemed to age him a decade, and he had lost an alarming amount of weight. Even today, his strange body shape, unusual height and long limbs have led to speculation that he harboured some hidden medical problem.

How to Watch National Geographic: Lincolns Secret Killer Legally and Safely

If you want to stream National Geographic: Lincolns Secret Killer through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry National Geographic: Lincolns Secret Killer films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.