Inventions - Gel pens: the secret fluid behind smooth writing
Inventions · 0:39
Gel pens: the secret fluid behind smooth writing (Wikipedia)
More videos
- Inventions - Polio vaccine: the drive to eradicate a paralyzing virus 0:42
- Inventions - The bass guitar: transforming rhythm sections with electric power 0:36
- Inventions - Payphones: the coin-operated booths that connected the world 0:39
- Inventions - Popcorn makers: from Victorian street carts to microwave bags 0:36
- Inventions - In-plane switching: perfecting liquid-crystal display screens 0:43
- Inventions - Outboard motors: self-contained marine propulsion and steering 0:36
- Inventions - Autopen: the machine behind high-profile signatures 0:41
- Inventions - Live2D: animating flat digital drawings into 2.5D motion 0:41
- Inventions - DASH: the digital studio tape you could cut 0:39
- Inventions - Fidget spinners: physics, fads, and unsubstantiated claims 0:43
- Inventions - Vignette road pricing: time-based highway access in Europe 0:41
- Inventions - The wind lens: boosting turbine efficiency through ducted airflow 0:37