A pulse oximeter is a device that clips on your finger, toe, or earlobe to measure blood oxygen saturation. Here's how it works and how to read it.

Learn what residual standard deviation is, how to calculate it in regression analysis, and why it's crucial for measuring predictability and goodness-of-fit in data modeling.

Real-time brain maps, smarter sensing and neuromodulation, and humane tech hint at a future we can sense—but not yet fully ...

Trea Turner, Kyle Schwarber, and Bryce Harper went 1-for-11 with six strikeouts in Game 1 against the Dodgers. Start your ...

The first fast radio burst, or FRB, was discovered in 2007 in archival data collected back in 2001, and scientists were ...

Overview of the process of obtaining genomic diversity of influenza virus in a population replicated from a single particle. (a) MDCK cells were infected with influenza vi ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

Colorado and over 20 other states have banned the practice aimed at changing the sexual orientation or gender identity of ...

Trump's demands that states turn over their voter rolls highlight conflicts over how to ensure that only eligible voters are ...

Calibration is one of the most critical steps in the pH measurement process. Some of the common calibration-related problems include out-of-range slope values and cell constants, inaccurate readings ...