All of io9's 2021 Year in Review Lists in One Convenient Location

The Best Sci-Fi, Fantasy, and Horror io9 Rewatched in 2021

Much like in 2020, we all spent a lot of 2021 taking the time to catch up on old favorites or check out classics we’d missed. Here’s the io9 team’s picks for the things they’ve loved revisiting most this year.

NextSense's EEG-equipped wireless earbuds are an intriguing idea, but I'm not sure if sleep-tracking can save me from constant tiredness.

Accessories & Wearables James Pero Apr 22

Created in 1897, it's over two decades older than the term "robot."

Culture Matt Novak Feb 28

Take one last look back at the year that was with all of our Year in Review stories.

Movies James Whitbrook Dec 31

As another year comes to a close, take a look back at the year that was with our most-read posts of 2025.

Movies Io9 Staff Dec 30

With three 'Ninja Gaiden' games, 'Ghost of Yotei,' and 'Shinobi,' ninjas returned to the gaming forefront in a big way.

Games Justin Carter Dec 29

io9 remembers the sci-fi, fantasy, and horror standouts we sadly said goodbye to this year.

io9 Io9 Staff Dec 26