Photo: Tim Morris * Caffeine This is why the world produces more than 16 billion pounds of coffee beans per year. It's actually an alkaloid plant toxin (like nicotine and cocaine), a bug killer ...

In black-and-white photography, this is done by reacting to the film with a compound (sodium thiosulfate) to inactivate or disable any remaining photoactive silver ions or particles that produced the ...

This early 1900s photo shows a coffee plantation in Costa Rica. The photo was published as part of a 1914 five-volume encyclopedia called “The New Student’s Reference Work.” San Jose, the capital ...