ome 250 million years ago, in the time when life was recovering from

The greatest mass extinction of all time, the Permian-Triassic mass extinction 250 million years ago, killed 95 percent of life, and the very few survivors faced a turbulent world, repeatedly hit by ice ages, rapid warming and ocean acidification cycles.

Through all of that, two main groups of tetrapods survived; the synapsids and archosaurs, ancestors of mammals and birds. And a new study find that the ancestors of both mammals and birds became warm-blooded at the same time.

In a Canada analysis, suicide was the most common cause of death from firearms at 68 percent, and older men in rural areas were impacted most.

I was homeschooled for eight years, from age 11 through to college, before it was a novel way for tiger parents to show off their dynamic commitment to their children’s education. Now, if millions of parents and families are suddenly going to be homeschooling their kids for the coming weeks (and, let’s be honest, quite likely beyond), it’s worth trying to think about how to do this in a manner as smooth, healthy and wise as possible.

Cannabidiol, a chemical found in marijuana plants, is enjoying a wave of financial success due to strange prescriptions for "medical" marijuana, which ended up overwhelmingly being obtained for recreation.

Yet belief in medicinal properties remain despite no evidence it does anything. The US Food and Drug Administration (FDA) does say it might help for rare forms of childhood epilepsy, but that has led to charlatans selling it as part of the "wellness" scam.

Supplements are fine for people who are healthy anyway. Yet those who have been duped into being marijuana will help with acne, afib, or anxiety are putting their physical or mental health at risk.

Once upon a time, there were six different species of early humans.

That's not science fiction, and they all belonged to the genus Homo, but only we Homo sapiens have survived. What killed  H. habilis, H. ergaster, H. erectus, H. heidelbergensis, and H. neanderthalensis? Nature exists to kill and birth so that seems a more likely culprit than conquest, and a new paper points the blame at one aspect of nature that dominated science media before the coronavirus pandemic - climate change.

Every dog owner knows that personality changes over time, but these changes occur unevenly during the dogs' life, and each trait follows a distinct age trajectory, according to a new study. 

Human personality is characterized by a peculiar dualism: it is both stable and malleable, depending on the point of reference. If we compare ourselves to our peers, it is stable as our personality rankings relative to others remain consistent over time. However, personality changes became obvious if we compare ourselves across time, as people become more conscientious, more emotionally stable, and more agreeable as they get older.