There's No Such Thing as a Safe Suntan
Every time you step outdoors, you are bombarded by ultraviolet (UV) radiation from the sun. UV rays cause the number of free radicals in cells to increase. Free radicals are atoms or molecules that contain oxygen in a highly reactive form. They are the same…
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More science facts
Physics
Ultraviolet Light
Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of…
Geology
The Importance Of Clouds And Aerosols To Climate Change
Everything, from an individual person to Earth as a whole, emits energy. Scientists refer to this energy as…
Biology
When Did A Cat Become A Kitty?
It has long been thought that cats were first domesticated in Egypt, about 4000 years ago. Indeed, they were…
Astronomy
What Is Polarimetry?
Polarimetry is the technique of measuring the 'polarization' of light. Most of the light we encounter every…