Ridddle

Ridddle is a Russian YouTube channel that uploads about educational videos.

Content
They upload educational and science videos in English. They sometimes upload science-fiction.

Criticism
They have been criticized by The Outline, because of the fact that their most popular video, titled "If You Detonated a Nuclear Bomb In The Marianas Trench", has over 17 million views with the fact that it is fantasy and not real science.

Million subscriber milestones

 * Ridddle hit 1 million subscribers on TBA.

Trivia

 * Their name is basically the world "riddle", but with 3 D's instead of 2.