Does rain ever fall as pure water?
No. Water is an excellent solvent and rain always contains dissolved gases from the atmosphere. Even in a remote, pollution-free region, rai...Read More
Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts
What is an event horizon?
There are three basic elements to a black hole. There’s the singularity itself, at the heart of a black hole and made of stellar matter ...Read More
What is the Goldilocks Zone?
The Goldilocks Zone is an area ‘just right’ for a life-sustaining planet – the perfect distance from a star with a surface neither too h...Read More
Why do our muscles ache?
Normally, when our muscles contract they shorten and bulge, much like a bodybuilder’s biceps. But if the muscle happens to be stretched ...Read More
What is a photon?
A photon is one of the elementary particles of the universe and is accountable for much of its basic structure. Photons are responsible ...Read More
How do painkillers cure headaches?
We all feel pain differently, depending on the severity of the injury or ache, as well as our health and our pain threshold. When you are in...Read More
Are cell mutations always bad?
A mutation is a change in the genetic material of an organism. We’re made from trillions of cells, each with a nucleus composed of DNA – a s...Read More
What is centrifugal force?
Centrifugal force describes the sensation one has of being pushed outward when moving along a circular path. The feeling of being pushed out...Read More
Tendons vs ligaments
While both tendons and ligaments are made of collagen cells, that’s where the similarity ends. Ligaments are the tough connective tissues th...Read More
Why do we sweat?
Sweat is produced by dedicated sweat glands, and is a mechanism used primarily by the body to reduce its internal temperature. There are two...Read More
What is a vacuum?
A vacuum is a space that has less gaseous pressure than the standard atmospheric pressure at sea level on Earth. A partial vacuum can be eas...Read More
How does whiplash affect us?
Whiplash is a widespread term used to describe a number of injuries caused when the neck is suddenly and quickly forced to move back and the...Read More
How does de-icer work?
De-icers work by lowering the freezing point of water, which causes it to turn back from ice into liquid water. Usually this is due to the a...Read More
How does detergent get our clothes clean?
Anionic surfactants are the workhorse ingredients of most washing detergents. They are compounds such as sodium alkyl sulphate and are made ...Read More
How does our vision work?
The eye is often compared to a basic camera, and indeed the very first camera was designed with the concept of the eye in mind. We can reduc...Read More
Why are bubbles spheres?
A bubble’s skin composed of a thin layer of water molecules sandwiched between soap molecules. Water has a high surface tension due to inter...Read More
How do glow sticks glow?
Inside a glow stick is a thin glass vial containing chemicals. When you bend the stick you’re breaking this vial open, releasing the chemica...Read More
Why do we sneeze?
When we breathe in, the inhaled air can contain dust, chemicals and other irritants that can be harmful to the body, particularly to organs ...Read More
What is gas?
Along with liquids and solids, gases are one of the three major states of matter. Typically they result when a substance is heated in its li...Read More
USING RNAi TO PROTECT CROPS
Field experiments testing the use of genetically engineered RNA interference against eukaryotic pathogens, an approach called host-induced g...Read More
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