Horse nations: Animal began transforming Native American life startlingly early

Complete sabertooth tiger skull from North American Midcontinent shows Smilodon males weighed ≥300 kg as adults and were competent hunters by 2-3 years old. C14 dating of specimen helps narrow extinction of species to 13,285 cal B.P. - 11,785 cal B.P.

What Is Xylazine? A Medical Toxicologist Explains How It Increases Overdose Risk and Why Narcan Can Still Save a Life

50 years ago, air pollution was linked to more reports of animal bites