Animals which hunt usually have eyes in the front. Both the eyes have the same field of view. However, since they are separated by some distance, there’s a parallax – information which their brain uses to calculate the three dimensional depth. This 3D vision is a boon for the animals who hunt because it helps them to exactly gauge the prey’s depth.
The good 3D vision also comes with its own cons. As both the eyes have the same field of view, the total amount of field they can cover is less. That means they can only see what’s happening in front of them. But can see it well in 3D. To see behind they might as well tilt their heads.
Rabbits on the other hand are themselves prey. The 3D vision wouldn’t have benefited them much. So, they have eyes on the 2 different sides of the head. And the eyes bulge out a lot. This means both the eyes see different things and a greater field of view is covered. However, the 3D stereoscopic vision is compromised. Thanks to the big field of view, they are easily able to spot predators coming down on them from the behind without even turning their heads.
Rabbits actually have a 360 degree vision, a panoramic view of the world. The only 3D vision rabbits have is 30 degrees of view in the front and 10 degrees behind them, because that is the region where the vision from both eyes overlaps.
I’ve always heard about short-hand, but I never cared to look it up and how it actually works. I had assumed that it must be very similar to what we type and it was a way to make your tyiping faster. Turns out, I was wrong. It’s very different.
Whatever happens in the court goes on record. There’s no computer doing the speech to text there. It’s humans. These people are trained to type about 200 words per minute and can manage an accuracy of 98.5%. That’s pretty incredible. But how they do it is a different story.
They use a different keyboard which has just 22 keys. There’s no full body QWERTY keyboard and it looks something like this.
Instead of typing down the whole word, they listen to how it sounds. The context doesn’t even matter to them. They just record the sounds. A long word can be completed in just a few strokes with their technique.
You’d say it’s gross, but then someone would find eating chicken gross. In Australia, you have these green ants called the weaver ants which are green in colour and can be eaten. According the people who’ve tested the taste in the video below, they taste good, like candy. Also, these ants are high in protein, fatty acids and vitamin C. They taste slightly soud because of their Ascorbic acid content.
But you have to careful when you eat them because like any other ants these can bite you while you are trying to eat them.
Since you’d have no practical use for them at home, I can’t imagine why you’d want to make carbon nanoparticles at home, but it sure sounds interesting. Grinding a chunk of carbon isn’t the way to go because after a certain point the size of particles stop getting smaller. Buying the nanopowder is definitely expensive. So, what should you do?
Well, scientists from University of Illinois have figured out an incredibly simple way to produce them at home. All you’d need for this is a little honey and a microwave.
The result is very tiny particles, of about 8 nm in size each.
“If you have a microwave and honey or molasses, you can pretty much make these particles at home”
Flathead screwdrivers are probably the worst kind of screwdrivers, it’s very easy to hurt yourself with them and their design is flawed because they slip very easily. In fact, that is how the square shaped screws intended to be driven by a Robertson screwdriver were invented when Peter L Robertson cut his hand while using a flathead screwdriver.
While this one is arguably the best screwdriver design, it was not and still is not very popular across the world, besides Canada, where Robertson lived