(Note: I got these from my Google Drive)

Measurements
Walking speed: 4.31 meters per second
Sprinting: 5.61 m/s
Sneaking: 1.29 m/s
Flying: 10.89 m/s
Sprint Flying: 14.16 m/s

Maximum height able to jump to using jump boost: 1.25 blocks

The player can walk a total of 5,181 blocks in one Minecraft day (20 minutes of gameplay)

Usernames must be 3-16 characters

Eye level of player is 1.62 meters
The player is 1.85 meters tall (6 foot 1)

One block is one meter
1,000 blocks is one kilometer
100 blocks is one hectometer
10 blocks is one dekameter

Chickens lay eggs every 5 to 10 minutes

There are 16 colors of wool, stained glass, stained glass panes, stained clay, and carpet

There are 61 distinct biomes
Biomes are separated into 5 categories

There are 8 types of ore

Players in water take 5 times the normal amount of time to mine blocks than when on land

Water will travel a distance of 7 blocks (8 counting the source block)

One minute in Minecraft is 0.8 seconds of gameplay
One hour in Minecraft is 50 seconds of gameplay
One week in Minecraft is 2.3 hours of gameplay
One month in Minecraft is 10 hours of gameplay
One year in Minecraft is 5 days of gameplay
One decade in Minecraft is 7.1 weeks of gameplay
One century in Minecraft is 1.37 years of gameplay
One millennium in Minecraft is 13.7 years of gameplay

One stack of items is 64 items, or sometimes 16 items
One full chest is 27 slots or 27 stacks, which is 1,728 items
One full inventory is 36 stacks, or 2,304 items
One full double chest is 54 stacks, or 3,456 items

A full hunger bar is 20 food points

One centimeter in Minecraft is 0.01 blocks
One foot in Minecraft is 0.0254 blocks
One yard in Minecraft is 0.9144 blocks
One mile in Minecraft is 1,609.344 blocks

One block in Minecraft is 3.28 feet, 39.37 inches, 1.093 yards, or 0.00062 miles
One block is approximately 1 yard, 3 feet, or 36 inches

The inventory contain 4 armor slots, 27 storage slots, and 9 hotbar slots

Generated structures include: ravines, abandoned mineshafts, strongholds, dungeons, villages, desert temples, jungle temples, ocean monuments, witch huts, desert wells, moss stone boulders, ice spikes, and nether fortresses

Spectator Mode allows you to fly around and observe the world without being able to interact with any of it. You can view a mob's point of view by left clicking on them, use the perspective change while using their point of view, and noclip through blocks. You are also invisible, but can still die in The Void and by /kill. You can use 1 and 2 to teleport to other players or teams.

Creepers have green pixelated, tinted vision
Endermen have inverted colors in their vision
Spiders have quintuple vision
Cave spiders have red tinted vision and spider vision

Pumpkins still filter spectator mode
You can view the perspective of minecarts, ender crystals, a primed TNT block, and any other minecart type
You can also see the POV of paintings and armor stands.

All mob POVs can be seen except the Ender Dragon

Adventure Mode disables block breaking except for mobs, item frames, and paintings.

The Ender Dragon gives the most XP orbs

The score is the number of experience that the player has collected since their last death.