Within the past 20 years or so, dozens of papers have been written regarding the human microbiome. Microbiota inhabit a variety of niches in the human body, with the gut being the primary location. Remarkably, “The human gut has the highest known cell densities of any microbial habitat on Earth.”¹ The number of microbiome cells number into the trillions for a single person.

“These are, high, high, highly intelligent creatures,” said conservation biologist Reese Halter.¹  

Green blood is not something you see every day. The recent search for why several species of lizards found in New Guinea have green blood assumes an evolutionary origin for these creatures. It seems like the researchers started with a discovery that indicates green blood developed independently in four species from red-blooded ancestors.¹