Pleased to report that I now know the difference between a cannonball and a mill ball.

Here are 15 interesting things people found recently, along with what they turned out to be.

Five thin pieces of wood with stepped edges are laid out on the floor. A hand is touching the leftmost piece

Two black corrugated sheets labeled "SU-5" lie on grassy ground outdoors

Two side-by-side photos show a small, rusty metal door on an exterior wall. A window and broom are visible in the second photo

Gloved hands holding a metal bar engraved with the word "Puritan."

A person holds up a vintage, ornate medal featuring a soldier and the text "AJAX" on the front, with a blurred outdoor background

On the left is a white lipstick-shaped object. On the right, what appears to be a  covered lipstick tube

Triangular metal gauge tool labeled "Microns" with various measurements hanging from a keyring attached to a dark handle on a wooden surface

A person holds a weathered, barnacle-encrusted cannonball found on a beach, with a metal detector and shovel visible in the background

Hand holding a clamshell-shaped red accessory that opens to reveal mirrors

A red-brick wall with a window and an overhanging brown box covers the window's lower portion. Trees are visible in a reflection in the window

A small, round, rusty thumbtack with a bent point is shown from different angles on a white surface; there is an "8" on the top

A hand holds a dark, round object over a cluttered desk with papers, books, and a pen holder in the background

Rusty metal object partially buried in dirt, appearing to be an old, weathered iron with a large round glass panel on top. Background features tree roots and wooden planks

Close-up of a metal patent plaque from January 1912 to April 1916 on the base of a wooden structure, with part of a cardboard box and clothing visible nearby