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World Record Domino Robot (100k dominoes in 24hrs)

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A robot named Dom just set up and toppled more dominoes in one day than most builders manage in a lifetime.

Mark Rober, the former NASA engineer turned YouTuber, published “World Record Domino Robot (100k dominoes in 24hrs)” on July 26, 2021, capping five years of quiet development on a machine built to do one thing: place dominoes faster than any human crew on earth. The result was a custom robot nicknamed “Dom,” short for Dominator, that placed 102,600 dominoes in 24 hours to build a massive, multi-colored mural inspired by Super Mario Bros.

• Dom placed 102,600 dominoes within a 24-hour window to complete a Super Mario Bros-themed mural.
• The project set a verified Guinness World Record for the most dominoes set up and toppled in one hour by a robot — 6,141 dominoes, achieved July 19, 2021, in Mountain View, California.
• Dom was developed over five years by Rober’s team, including engineer Alex Baucom, and runs roughly ten times faster than a human domino builder.

Five Years in the Making

Rober didn’t rush this one out. The video opens with him admitting he was “happy to finally release this one after 5 years of development,” and that timeline shows in the finished machine. Building a robot that can outpace a human domino artist isn’t a weekend build — it required a team of engineers and students working through iteration after iteration to get the mechanics, the sensors, and the software to cooperate at speed.

Alex Baucom, part of the engineering team, helped turn the concept into a working cart-based system that could survive a 24-hour stress test without jamming, misfiring, or knocking down the wrong row at the wrong moment. That reliability mattered more than raw speed, since a single bad drop late in a 100,000-domino run could wreck the whole mural.

Core Mechanisms of Document Object Model

The system starts at an automated sorting and loading funnel station, which feeds dominoes into the robot 300 at a time. From there, Dom rolls across the warehouse floor on pre-programmed routes, using precision sensors to stay locked onto its path. When it reaches the right spot, it lowers all 300 dominoes simultaneously through a drop mechanism that works like a giant Connect Four board, slotting them into place in one motion instead of one domino at a time.

That batch-drop approach is what makes the ten-times-human speed possible. A person building by hand has to place, check, and adjust each piece individually. Dom skips that bottleneck entirely by treating each 300-domino load as a single placement, which is also why the final tally didn’t stop at a clean 100,000 — it kept running to 102,600.

Breaking the Guinness Record

Before the full 24-hour mural run, Rober’s team put Dom through an official Guinness World Record attempt on July 19, 2021, in Mountain View, California. The category: most dominoes set up and toppled in one hour by a robot. Dom cleared it with 6,141 dominoes, a verified number that gave the project an official record to point to before the bigger spectacle even began.

6,141 dominoes toppled in a single hour — the number that made it official.

Man vs. Machine: Rober vs. Hevesh5

To make the speed gap tangible, Rober set Dom loose next to professional domino artist Lily Hevesh, known online as Hevesh5, who built by hand alongside the machine before the final mural was toppled. Watching a world-class human builder work at full speed only next to a robot placing 300 pieces per drop made the ten-to-one comparison land — this wasn’t a stunt against an amateur, it was against one of the best in the craft.

It’s the same instinct behind other engineered-spectacle videos in this corner of YouTube — pushing a single stunt to a record-breaking scale, the way Rober’s peers have chased their own oversized challenges in World’s Largest Challenge! or the record-hunting stunt in World’s Longest T-Shirt Launch | OT 33.

By the time the last domino in the Super Mario mural fell, Dom had done in 24 hours what would’ve taken a human crew days to attempt and still probably botched somewhere in the middle. The Guinness record is now on the books at 6,141 per hour — whoever comes for it next has a very specific number to beat.