New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

IN these days of accurate clocks and watches no one thinks of using a sun dial to tell the time of day. At best such an instrument can be right but four times a year, and in many places it can ...

Springer Nature, the stalwart publisher of scientific journals including the prestigious Nature as well as the nearly 200-year-old magazine Scientific American ... needed for accuracy and clarity.

Harris is Scientific American’s second presidential endorsement in its history, after the magazine backed President Joe Biden ...