Rods' are sensitive to brightness and three types of 'cones' are responsible for detecting colour. The three types of cones are sensitive to lights of certain wavelengths...
The 'blue' cones are more sensitive to blue than violet, so when you look up at the sky, the cones tell your brain you are seeing blue even though there is violet there.
Source:
http://www.physics.org/article-questions.asp?id=108
Weather pain is a sensation that was noticed by Hippocrates back in 400 B.C. Today, people suffering from arthritis are still complaining about worsening pain before an impending storm, and scientists are still puzzled about why exactly stormy days cause more discomfort than other days.
Source:
http://www.todayifoundout.com/index.php/2013/12/bad-weather-can-cause-joints-ache/
Results showed no association between back pain and temperature, humidity, air pressure, wind direction or precipitation. However, higher temperatures did slightly increase the chances of lower back pain, but the amount of the increase was not clinically important...
Source:
https://www.georgeinstitute.org.au/media-releases/weather-not-to-blame-for-your-aches-and-pains
Polar bears aren’t actually white. Their fur is a series of clear, hollow, translucent tubes which reflect light, making the bear appear white. It’s the same reason why snow — which is, at its core, crystallized water (and therefore clear) — also appears white.
Source:
http://nowiknow.com/invisible-polar-bears/
The dolphins start off gray when they’re young and slowly turn pink as they get older. Their final color can be influenced by their behavior, capillary placement, diet, and exposure to sunlight. The dolphins can be anywhere from mostly gray with some pink spots, to almost flamingo pink. And when the dolphins get excited, they can flush bright pink, similar to humans blushing.
Source:
http://www2.padi.com/blog/2017/02/13/5-facts-amazon-pink-river-dolphin/
Albinism occurs when cells that normally make the pigment melanin, responsible for skin, hair, and eye color, fail to produce it at normal levels, or at all. This is mostly caused by a mutation in several genes.
Source:
https://news.nationalgeographic.com/2015/09/150909-pinky-albino-bottlenose-dolphin-animals-science/
And so on and so on...
Not indicating that the content you copy/paste is not your original work could be seen as plagiarism.
Some tips to share content and add value:
- Use a few sentences from your source in “quotes.” Use HTML tags or Markdown.
- Linking to your source.
- Include your own original thoughts and ideas on what you have shared.
Repeated plagiarized posts are considered spam. Spam is discouraged by the community, and may result in action from the cheetah bot.
Creative Commons: If you are posting content under a Creative Commons license, please attribute and link according to the specific license. If you are posting content under CC0 or Public Domain please consider noting that at the end of your post.
If you are actually the original author, please do reply to let us know!
Thank You!
More Info: Abuse Guide - 2017.