In over 30 years of writing at least 7,000 word of great trivia content per month, I have covered a LOT of topics. Here is a non-exhaustive list of many!
Typical
A&P Grocery Stores
Advertising
Air pollution
Airplane quiz
Airplanes
Alcatraz prison
Alcohol origins
Amazon forest
Amber the gemstone
Amusement parks
Antarctica
April fools jokes
Arctic
Arctic disasters
Arctic Explorers
Area codes
Atmosphere
Avalanche
Avalanche train disaster
Backwards things
Bad Art
Bad baseball plays
Bad Days
Bank Robberies
Barbie doll
Baseball pitchers
Baths
batteries
Bauch & Lomb optics and glasses
Beating diseases
Biggest stuff
Blood transfusions
Blue jeans
Board games
Body Facts
Body myths
Books, their history through the ages
Bottles
Bra Brassiere history and development
Brain
Brinks robbery
Brooklyn Bridge
By-Products
Caffeine
Cape Canaveral rocket launch headquarters
Car Designers
Carrington Event EMP from the sun
Cars
Castaways shipwrecks
Caterpillar club people saved by parachutes
Cheddar man ancient human of England
Chess facts, chess words
Chicago fire
Chlorine trifluoride poisonous gas
Christmas Carols
Christmas WTF
Close Calls and narrow escapes
Clothing
CNN Tower (Canada)
Coincidences
Coins
Color blindness
Comets asteroids and meteors - what's the difference?
Composers
Computers
Credit Cards
Crossword puzzles
Crying
Cuyahoga River catches on fire
Dancing
Dangerous Toys
Daylight savings time
Death Valley National Park California
Deodorants
Derecho the big storms
Diamonds
Dinner Party Disasters
Dinosaurs
Dishwasher machine
Disney World Florida
Dollar bills
Dreaming during sleep
Dry cleaning
Dumpsters the big garbage bins
Dust
Dynamite
Eclipse of the sun
Edmund Fitzgerald the ship and the song
Elevators
Email- how it got invented
Etch-a-Sketch the toy
Eye Facts
Fabric facts
Failed trademark cases
Famous Franchises
Famous Horse races
Famous Last Words
Farts
Feet
Female pirates
Fictional Castaways
Fictional places
Fingernails
Fingerprint Foibles
Fingerprints
Flight
football (American football)
Footnotes of History
Fossil forest of the arctic
Freaky Facts
Galloping Gertie the disastrous bridge
Generica the rise of generic stores
Geography
Gilligan’s Island the famous comedy TV show
Give-aways that got away
Glass
Gold
Golf
GRASS
Grocery Stores
Groundhogs
Guinness book of world records / Ripley’s believe it or not
Topics
Hail
Hair
Hair inventions and the people behind them
Helium
Hospitals
How to make a mirror
Human body facts
Human hailstones
Human heart
Hurricanes
Huygens space probe
I Told You So, people who got the last laugh
Ice Balloon, an arctic disaster
Ice cream
Icky Dinners
Ikea
IMPOSTERS
Insomnia
INSULTS
Interstate highways
inventors killed by their inventions
Irony
Jacuzzi - the hot tub
Jam jelly and juice
Japan Tsunami of 2011
Kentucky Derby
Kitsault Canada- modern Ghost Town
Knights & Archers
Krakatoa the volcano
LA BREA TAR PITS
Lake Mead, the disappearing reservoir
Lakes
Laughter
Lead, the metal
Libraries
Light Bulbs
lightbulbs, the frosted kind
Little Glitches cause big problems
Long Falls - people who fell
Lottery
Macbeth
Made-up Measures
Major Martin the ficticious dead spy
Mariana Trench, deepest point in the ocean
Mars Curse, problems getting spacecraft to Mars
Master’s Tournament in Golf
Matches and why they catch on fire
McDonalds the hamburger chain
Measurements and how they got so weird (Imperial)
medicine chest- things in your bathroom
Memorable Partings
Mercury Poisoning
Messages in bottles
Metric system
Mice
Miracles at Sea
Mirrors
Misconceptions
Money
Monowi, Nebraska, Population 1 / smallest town
Moon facts
Mosquitoes
Mount Everest
Mount St Helens volcano
Mount Toba super volcano
Mylar the incredible material
National Trivia Day
nautical races, boats and sailboats
Neckties
Niagara Falls
Nickers - the pants- knickerbocker
Nicotine
Nose and smell
Odd Measurements - unusual ways of measuring thing
Odd Odds and Weird Bets
Office Supplies
Olestra the disastrous fat substitute
Opera
Pacific Ocean
Paper
Patriotic Items
People Named Smith
People named Z for National Z week
Perfume
Peshtigo fire, the disaster of Wisconcin
Petroleum
Pianos
pirates
Plastic
Plastic bags and bottles
Plymouth Rock where the first pilgrims landed their ship Mayflower
Point Nemo furthest point from land
Poison
poker
Pompeii buried by Mt. Vesuvius
potato blight of Ireland
pranks and practical jokes
Punctuation $#%&^*@!
Rabies
Radithor: radioactive medicine and the death of Eben Byers
Rain
Random Facts
Refrigerators
Restaurant Facts
Richest people showing off: epic ostentation
Roller coasters
Roller coasters: the Kinga Ka
Roswell Incident UFO in New Mexico
Rubber
Rubber bands
Rust
Rust prevention
I Have
Sacrificial satellites
Salt
Sand
Sand Sleuths
Satellites
Scrabble the board game
Scurvy
Secret Codes
Sequoyah Indian tribe
Serendipitous science: lucky breaks in the lab
Shoes
Silly Putty the goo
Sizes of Things
Skin
Sleep
Sleep Deprivation contests
slinky the toy
Slugging it out for Slogans - a fight between airlines