New evidence from fossils representing two groups of human ancestors—Australopithecus and early Homo—adds an important piece to the puzzle about when our ancestors transitioned from a life often spent ...

An irregular pattern and consistently higher levels of a stress hormone called cortisol found in the saliva were associated with cognitive decline later in life — Blacks specifically had lower overall ...

What mechanism causes the fuzzy quantum superposition state of an alive-and-dead cat to snap into a certain outcome, when Schrödinger opens his box? “One of the deepest questions in modern physics is ...

A Stanford team has documented the first direct observation of quantum jumps of sound in a mechanical resonator, completing an arc of scientific exploration that started over a hundred years ago.

Young people living with HIV manage their condition better when their antiretroviral therapy is given by injections every eight weeks, rather than in the form of daily tablets, according to the ...

UC San Francisco researchers are weighing in on one of the biggest challenges in psychedelic science, arguing that clinical trials need more convincing placebo treatments to better measure the drugs' ...