What is an avalanche airbag? An avalanche airbag is a backpack that contains an inflatable balloon to increase the wearer’s volume. An avalanche happens when the snowpack separates from the ground and is pulled down the mountain by gravity. They can happen when there has been heavy snowfall, and the snowpack becomes too heavy to […]
#1542 What is an avalanche airbag? Read More »
How can you focus on smart contact lenses? Smart contact lenses have sensors that can track your eye movements and the dilation of the pupil. They can automatically adjust their focus until you are able to see them. And they project the image directly onto your retina. If you are like me, your eyes are
#1541 How can you focus on smart contact lenses? Read More »
Are all snowflakes really different? Theoretically, yes, all snowflakes are different, but it is an issue of probability, and there is obviously no way to know for sure. Snowflakes form when the air is cold enough for water droplets to freeze. It is very difficult for them to freeze on their own; it is much
#1540 Are all snowflakes really different? Read More »
Who was Jim Crow? Jim Crow was a fictional character played by a white actor in blackface in the 1830s, called Thomas Dartmouth “Daddy” Rice. He portrayed an African American slave called Jim Crow. The name later got taken up and made famous in the Jim Crow laws. The Jim Crow laws are not one
#1539 Who was Jim Crow? Read More »
How does kidney dialysis work? Kidney dialysis works by filtering the blood to remove excess water and toxins in cases where the kidneys have failed. Most people have two kidneys, although we can function perfectly on only one. The second one is basically an evolutionary backup in case one of them fails. This is called
#1538 How does kidney dialysis work? Read More »
How does projection mapping work? Projection mapping works by using very powerful projectors and software that can map the shapes and angles of the object to be projected upon. You may need two things to do projection mapping. The first is an incredibly powerful projector, or several very powerful projectors for larger venues. The power
#1537 How does projection mapping work? Read More »
Why does old paper turn yellow? Old paper turns yellow because lignin and cellulose break down. Most things in our world fade with time. The most common culprit is ultraviolet light. If you have a photo on your desk or a nice painting on your wall, over time, it will lose its vibrant color. And
#1536 Why does old paper turn yellow? Read More »
How would an invisibility cloak work? There are basically three ways you could make something invisible. You could use camouflage to hide it. You could use cameras to project the view behind the object in front of it. Or you could manipulate light so that it bends around the object being hidden. We have all
#1535 How would an invisibility cloak work? Read More »
How do owls fly silently? Owls have specialized feathers that allow them to fly silently. If you live outside of a city, you may have heard owls hooting at night. You may even have heard them if you live in a city, because these days there are a lot of urban owls. It is not
#1534 How do owls fly silently? Read More »
When did people start using surnames? People started using surnames at different times in different countries. In Europe, surnames started in the 11th century. I am from the UK, so I am going to begin by looking at the origin of surnames in Europe and then look at other parts of the world. The word
#1533 When did people start using surnames? Read More »
