An alternate extinction hypothesis, from Melott et al. (2004), suggested that a ten-second gamma-ray burst could have destroyed the ozone layer and exposed terrestrial and marine surface-dwelling life to deadly radiation and initiated global cooling. https://en.wikipedia.org/wiki/Radiation
The electromagnetic spectrum This includes electro-magnetic radiation such as radio waves, visible light, and x-rays, particle radiation such as α, β, and neutron radiation and acoustic radiation such as ultrasound, sound, and seismic waves. https://en.wikipedia.org/wiki/Visible_light
A triangular prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (blue) get separated
Invisible light and Light are the same Wikipedia pages regardless if linked or not.
I changed the quoted text that included "invisible light" because the one you quoted wasn't linked, albeit you expressed why you did such. I, too, lost it after I followed your steps and clicked on it. Note that once a link is clicked, the color of the linked text changes from a shade of blue to a shade of purple, thus easily overlooked due to the non-usage of underlining links.
No need to link italic text under images.
As for the images, I wanted them to be of actual footage as much as possible oppose to graphics. Although I love the Pink Floyd-esque image, the clouds would've been a better fit.
Thanks kindly, notbatman, for your efforts. You scored a 76.
