Satellites and spacecraft in the vast region between Earth and the moon and just beyond—called cislunar space—are crucial for ...

Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. Updated March 11 at 2:18 p.m. A third round of stimulus checks, part of ...

Over the course of the 1970s, handheld electronic calculators transformed the way tens of millions of people did arithmetic. Engineers abandoned slide rules, business people gave up desktop ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

First families get their Secret Service code names at the very beginning of a presidential campaign. Presidents get to choose from a list provided by the White House Communications Agency. The code ...

Self-employment tax is a mix of Social Security and Medicare taxes. Use our calculator to estimate what you owe. Many, or all, of the products featured on this page are from our advertising partners ...

Constant tiredness could stem from poor sleep, nutrient deficiencies, chronic stress, or an underlying medical condition that needs treatment. Common fatigue triggers may include eating an unbalanced ...

Federal income tax rates range from 10% to 37%. Find out how they work and which brackets you're in. Many, or all, of the products featured on this page are from our advertising partners who ...

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