Image by Science in HD on Unsplash

 

 

Matthew Smith on Unsplash

 

 

Image by Michael Heuss on Unsplash

 

 

Image by Timothy Dykes on Unsplash

 

 

**Featured Image from an old screensaver 

**Science featured Image screenshot from The Devil Commands, 1941 on Blackholereviews

Featured image for science sub-categories by SOARnet on Pixabay

**Nature featured image: Cumberland Falls rainbow, 2008 by James St. John – Wikimedia

Featured images for sub-categories:

Autumn mountain by Noah Buscher on Unsplash
Turtles by Massimo Negrello on Unsplash
Lightning by NOAA on Unsplash

**Religion featured image by Chirag K on Unsplash

**Linguistics featured image by Jason Rosewell on Unsplash