Redshift and blueshift of light, Credit:Wikimedia/Aleš Tošovský Table of Contents What does redshift mean? It’s often compared to the high-pitched whine of an ambulance siren that gets lower as the ambulance moves past you and then away from you. The Doppler effect is what causes the sound of an ambulance

The Vitruvian Man, Credit: Wikimedia/Leonardo da Vinci Over the course of history, artists, scientists, and even mathematicians have noticed that the same number keeps popping up in nature, art, architecture, and science, among other places. It is called “phi,” but it is also called “the golden ratio” and “the golden

In shallow waters close to the shores of islands and continents, there are colorful ecosystems called coral reefs. These reefs are built by coral polyps—a marine animal. A coral reef. Sunscreens are safer for corals now, Credit: Wikimedia/Toby Hudson Although they only occupy a tiny fraction of the Earth’s surface,

A good night’s sleep is a reward for all the hard work throughout the day. During sleep, our body repairs and regrows tissues, builds muscles and bones, and slows our heart rate down. However, sleep is not a uniform process, and there are stages in the sleep cycle.   Broadly,

Sun through spectacles, Credit: Wikimedia/Thuwaraga vilvanathan One of the most harmful components of sunlight is its UV rays. Apart from multiple skin diseases, UV rays can also cause serious damage to our eyes. Chronic exposure is known to decrease vision and induce cataracts. Reducing UV ray exposure is very important.

The high voltage breakdown of plexiglass creates beautiful fractal patterns called Lichtenberg figures. Credit: Bert Hickman “Catching lightning in a bottle” is an idiom for a nearly impossible goal. While trapping lightning in a bottle is still out of reach, we can trap lightning in plexiglass or acrylic with some