in History Researchers follow a 15th century recipe to recreate Medieval blue ink (www.smithsonianmag.com) The purplish-blue pigment, derived from a Portuguese fruit, fell out of use by the 19th century and its chemical makeup was soon forgotten. by What a Find June 14, 2020, 2:33 pm Visit Original Article 15th centuryresearch Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ Posted by What a Find Team Editor Whatafind.com
Strange glass spheres found in ancient Florida clams point to meteor strike (www.discovermagazine.com)