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In a new Annals "Beyond the Guidelines" feature, a general internal medicine physician and a cardiologist discuss how to evaluate and manage perioperative cardiovascular risk in an older patient with multiple chronic conditions who is preparing for noncardiac surgery.

Our understanding of the internal structure of protons is largely based on classical physics, but data compiled from accelerator experiments has uncovered quantum behaviour that has never been seen before.

Researchers at the University of Basel and the Technical University of Munich have developed a new method to reveal the collective motion of electrons in one of the most elusive states of matter: the Wigner crystal. Using light, the physicists were able to uncover previously inac

Fever is one of the best-known mechanisms by which animals combat infectious diseases. Sick animals can increase their body temperature in two ways: through physiological regulation, by altering internal metabolic processes, or through behavioral changes, such as seeking warmer e

Exclusive: Serious questions raised about whether Chinese citizen was properly monitored at centre run by US prison giantGet our breaking news email, free app or daily news podcastThe US private prison company running Australia’s immigration system was warned that a newly detaine

In the animal kingdom, only those that adapt to their environment survive. This adaptation takes a wide range of forms, from invisible internal shifts in gene expression to dramatic anatomical changes, such as tadpoles growing legs and transitioning to life on land as frogs.

The bank is asking a judge to permanently dismiss a lawsuit from Trump-affiliated businesses, arguing a monthslong internal review — not the Jan. 6 riot — explains why hundreds of accounts were shut down in 2021.

Cybersecurity wasn’t really something small and mid-sized businesses worried about too much a few years back. That’s changed fast. Once your customer data, your apps, your internal tools all end up online, protecting the server behind them stops being optional. And attacks aren’t

Stress may literally scramble the brain’s internal GPS. Researchers found that cortisol, a hormone released during stress, made people significantly worse at navigating a virtual environment and disrupted the precise activity of grid cells, specialized brain cells that help us un

OpenAI says it is pausing "internal activities" around an in-development AI model, Astra, because it doesn't yet meet new security standards the company is putting in place. The announcement follows its recent disclosure that OpenAI models accidentally hacked Hugging Face. Anthro