IEEE Spectrum on MSN22h
Before the Undo Command, There Was the Electric Eraser
An electric eraser could also be a timesaver. In the days before computer-aided drawing and the ease of the delete and undo ...
South Florida Reporter2d
A Pencil With An Attached Eraser Was Created In 1858 Almost 200 Years After The Pencil
Henry David Thoreau and his father invented the graphite, which creates very readable text; This became standard in ...
C&EN1y
The Secret Science of Pencils & Erasers
The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...
Hackaday2y
Power Up Your Pencil With The 30,000 RPM Erase-O-Matic
There are some inventions that look completely pointless to the untrained eye: who would ever need a motorized garbage can, an electric pencil sharpener or a battery-powered eraser? Quite often ...
Recombu5d
10 Best Automatic Pencil With Erasers
Twist-Erase III Mechanical Pencils feature a sturdy ... grip delivers maximum comfort and control With the jumbo Twist-Up Eraser, you'll suffer no smudges, no paper tears and no ghosts Each ...
The Oxford Eagle12d
What type pencil are you?
By TJ Ray Columnist I bet that anyone who uses a computer regularly probably sees dozens of quotes or sayings. Often the ...
Smithsonian Magazine on MSN18d
Microplastics Are Making Photosynthesis Harder for Plants—and That Could Slash Crop Yields, Study Suggests
On average, these little particles could reduce photosynthesis in plants and algae by up to 12 percent, according to the paper ...
BBC3y
The history inside your pencil case
Pencils, erasers, ballpoint pens - it was always fun to start a new term with a new brace of equipment in your pencil case. And have you ever thought about the history behind those school essentials?