Peach stone carving
Peach stone carving has a long history in China and is first recorded in the middle of the Song dynasty.
Chirimenbon
Chirimen-bon is a book made of crepe paper, usually illustrated with multi-colored woodblocks print and bound in Japanese style. Many of them were produced from the Meiji to early Showa era (latter half of the 19th century to first half of the 20th century).
Pemmican
Pemmican is dried meat pounded into coarse powder and mixed with an equal amount of melted fat, and occasionally saskatoon berries or other edibles. It's the ultimate protein bar.
Mutter Museum
Mutter Museum is a collection of medical oddities, anatomical and pathological specimens, wax models, and antique medical equipment.
Gronchi Rosa
The Gronchi Rosa is a rare Italian postage stamp design error. The 205 liras rosa was intended for the stopover in Peru. The artist made a mistake with the boundaries between Peru and Ecuador.
Nonseum
A museum full of exhibits invented by eccentrics - from a heated garden gnome to finger nail guillotines to high heel protectors.
René Dagron
René Dagron was a French photographer and inventor. During the siege of Paris, Dagron proposed to the authorities to use his microfilming process to carry the messages by carrier pigeons. Dagron photographed pages of newspapers in their entirety which he then converted into miniature photographs. He subsequently removed the collodion film from the glass base and rolled it tightly into a cylindrical shape which he then inserted into miniature tubes that were transported fastened on the wings of pigeons. Upon receipt the microphotograph was reattached to a glass frame and was then projected by magic lantern on the wall. The message contained in the microfilm could then be transcribed or copied. By 28 January 1871, when Paris and the Government of National Defense surrendered, Dagron had delivered 115,000 messages to Paris by carrier pigeon.
Aerogel
Aerogel is a manufactured material with the lowest bulk density of any known porous solid. It is derived from a gel in which the liquid component of the gel has been replaced with a gas. The result is an extremely low-density solid with several remarkable properties, most notably its effectiveness as a thermal insulator. It is nicknamed frozen smoke, solid smoke, solid air or blue smoke due to its translucent nature and the way light scatters in the material.
QSL cards
QSL cards are written confirmations of either a two-way radiocommunication between two amateur radio stations or a one-way reception of a signal from an AM radio, FM radio, television or shortwave station. They can also confirm the reception of a two-way radiocommunication by a third party. A typical QSL card is the same size and made from the same material as a typical postcard, and many are sent through the mail as a standard postcard.
Toads in stone
Stories of animals - mostly toads - found alive when a stone or a lump of coal is broken open date back centuries.