Latest Tetrachromacy Stories
Extra photoreceptor gene discovered in Tetrachromat Artist, giving the ability to process different variations of color luminance compared to average human color vision observer San
New research has shown that certain Australian native flowers have shifted away from using insects as pollinators and evolved their flower color to the red hues favored by birds.
A biologist at Emory University says evolutionary biologists need to shift their focus from present-day molecules to synthesized, ancestral ones.
Ultraviolet vision evolved at least eight times in birds from a common violet sensitive ancestor.
Contrary to our human perception of bird coloration as extraordinarily diverse, a new study reports that bird plumages exhibit only a small fraction (less than a third) of the possible colors birds can observe.
Emory University researchers have identified the first fish known to have switched from ultraviolet vision to violet vision, or the ability to see blue light. The discovery is also the first example of an animal deleting a molecule to change its visual spectrum.
BEND, Ore., May 14 /PRNewswire/ -- WindowAlert announced today that it has sent technologically advanced window decals to 1600 Pennsylvania Avenue in Washington DC. The decals help prevent wild birds from striking windows.
- A handkerchief.
- Specifically— The legendary sweat-cloth; the handkerchief of St. Veronica, according to tradition miraculously impressed with the mask of Christ; also, the napkin about Christ's head (Johu xx. 7).
- In general, any miraculous portrait of Christ.