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The mystery behind how birds navigate might finally be solved: it's not the iron in their beaks providing a magnetic compass, but a protein in their eyes that lets them "see" Earth's magnetic fields.
These findings come courtesy of two papers - one studying robins, the other zebra finches.
The fancy eye protein is called Cry4, and it's part of a class of proteins called cryptochromes - photoreceptors sensitive to blue light, found in both plants and animals. These proteins play a role in regulating circadian rhythms.
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Birds Can See Earth's Magnetic Fields, And Now We Know How That's Possible
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Confess your sins to the Lord and you will be forgiven;
confess them to man and you will be laughed at.
-- Josh Billings
(Score: 2) by Absolutely.Geek on Monday September 03 2018, @08:36PM
Then why are you not trying to reinstate the words invalid or cripple into the general parlance; physically disabled people decided that these names were not descriptive enough and were used in a derogatory manner.
The "retard" community has also decided that it doesn't like that term and has limited descriptive power and is often used in a negative way; hence they have asked for it to be changed. Being part of that community affords members a certain privilege to affect change regarding the community. The way to begin producing the change you want is to remove the official references to the terms you don't like.
Don't trust the police or the government - Shihad: My mind's sedate.