{"id":"52d8f627fb7957d9b705a1f18f81dc4f","text":"A healthy (non-colorblind) human eye can distinguish between 500 shades of gray.","source":"djtech.net","source_url":"https://www.djtech.net/humor/shorty_useless_facts.htm","language":"en","permalink":"https://uselessfacts.jsph.pl/api/v2/facts/52d8f627fb7957d9b705a1f18f81dc4f"}