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On this day in history — October 30, 1888: Inventor John J. Loud patented a pen with a revolving ball tip for marking rough surfaces. Credit: U.S. Patent 392,046. #STEMWire (stem.news) 🛰️
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Celebrate National STEM Day 2026! Educators, entrepreneurs & community leaders: save 10% on STEM.org Certified™ Expanded Edition—available in 11 languages. Use STEMDAY2026. Enroll: stem.org/certified/ Ends Nov. 30 at 7 p.m. Eastern.
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On this day in history — October 29, 1675: Mathematician Gottfried Wilhelm Leibniz first used the integral symbol ∫ in an unpublished manuscript. Credit: MacTutor History of Mathematics. #STEMWire (stem.news) 🛰️
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Breaking science, technology, engineering & mathematics #STEM news from around the web. #STEMWire v5.0 🇺🇸 inlandrail.com.au/benalla-br…
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On this day in history — October 28, 1971: The United Kingdom launched Prospero, its first technology satellite, into orbit on a Black Arrow rocket. Credit: European Space Agency. #STEMWire (stem.news) 🛰️
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On this day in history — October 27, 1904: New York’s Interborough Rapid Transit subway opened with 28 stations along a 9.1-mile line. Credit: New York Transit Museum. mta.info/subwayday #STEMWire (stem.news) 🛰️
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