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Ancient Roman Sanitation 01 Nov 2026
The sophisticated sanitation system in ancient Rome has been the subject of study by historians and archeologists for centuries. Antiquity's largest city, imperial Rome counted well over a million inhabitants at its height. The city was supplied with water—from as far as 57…
The History of Ferrous Metallurgy 31 Oct 2026
Iron is the fourth most abundant element in the Earth's crust and likely a major component of its core, but it is rarely found in a readily usable form in nature except in meteorites. For that reason, it is likely that the use of iron in its free state began in prehistory with…
Dango 30 Oct 2026
A dango is a Japanese dumpling made from rice flour. Three or four of these dumplings are often served on a skewer accompanied with green tea. Savory, sweet, or both, they are flavored with a number of different ingredients, including eggs, green tea, sesame, soy sauce, and the…
The Rotten Egg Nebula 29 Oct 2026
The Calabash Nebula is a protoplanetary nebula 1.4 light years long and located approximately 5,000 light years from Earth. It is sometimes called the Rotten Egg Nebula because it contains a relatively large amount of sulfur. The densest parts of the nebula are composed of…