Traveling towards galaxies at near light-speed affects how we see their light due to the Doppler effect. This effect, which can change the color of light based on relative motion, would cause galaxies we’re approaching to appear bluer. This change to a bluer hue is called “blueshift.” Here’s why: Light,

Sumo wrestlers need to be big and strong to push their opponents out of the ring. To achieve this, they follow a special diet and training routine. They eat a dish called “chanko-nabe”, which is a hearty stew filled with meat, fish, vegetables, and tofu. A wrestler might eat up

Touch lamps work by sensing the change in capacitance when you touch them. Capacitance is the ability of an object to store electrical energy. Everything, including the human body, has some capacitance. When you touch the lamp, you increase its capacitance. These lamps have a circuit inside with a component

The horizon is the point where the sky seems to meet the ground or sea. Its distance depends on your height above the ground. The Earth is more like a giant ball, and as you stand higher, you can see further over its curve. Here’s a simple way to calculate

Our senses pick up information from the world around us, but they don’t pick up every tiny detail every single second. Instead, they have a “time resolution”. Time resolution is a reset button. After every sensation, our sense organs snooze off for sometime before they pick up a different sensation.

Birds don’t pee like humans and many other animals. Instead, they manage to work by just pooping. When we eat food, our bodies take nutrients and produce waste. We release liquid waste as pee (urine) and solid waste as poop. Birds, however, combine both into one substance. The white, pasty

While we look for a bunker during a nuclear fallout, cockroaches can absorb a huge amount of radiation. A cockroach can survive a nuclear explosion better than many other creatures, and evolution has made them resilient. During a nuclear blast, intense heat, pressure, and radiation are released. The cockroach’s small

When you cut grass, it releases chemicals. One main chemical is “cis-3-hexenal.” The grass does this to alert other plants that it’s been damaged. This chemical gives the fresh smell we notice after mowing. Now, why do we like this smell? Our brains have evolved to like certain scents. This

Green screens are tools used in film and TV to change the background behind subjects. They’re bright green because this color doesn’t usually match people’s clothes or skin. This means computers can easily spot and replace the green parts with another image or video. In digital cameras, there’s a pattern

Every person needs a certain amount of oxygen to breathe. On average, a human breathes in about 550 liters of pure oxygen per day. Trees produce oxygen as a by-product when they make their food through a process called photosynthesis. Now, how much oxygen a tree produces depends on its