Same-sex behavior is common across the animal kingdom—more than 1,500 species are estimated to have been observed engaging in ...

Biologists tend to look at the animal kingdom and try to categorize things in an organized fashion. But nature has a way of ...

Parrots represent one of the most interesting and colourful species of birds. The parrot family, scientifically classified ...

The analysis of dental remains from Dmanisi in the Republic of Georgia has important implications regarding the balance and ...

This has been quite the wild year in human evolution stories. Our relatives, living and extinct, got a lot of attention—from ...

For decades, the story seemed settled: one early human species left Africa and spread across the world. But a new study ...

Megalodon sharks were among the largest and most formidable predators ever to exist, dominating the oceans millions of years ...

Irish and Irish Americans tend to throw around phrases like "Sláinte" and "Top of the morning to ye" - especially on St. Patrick's Day! - but how many of us really know what these beloved Irish ...

Marshall Hargrave is a stock analyst and writer with 10+ years of experience covering stocks and markets, as well as analyzing and valuing companies. Yarilet Perez is an experienced multimedia ...

Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

Steffini Stalos, DO, FCAP, is a pathology and lab medicine physician. She is also the chief medical officer of the lab consultancy firm Blood Associates, LLC. Mean corpuscular hemoglobin concentration ...