Older Than deck / Events and discoveries
Superconductivity
Discovered
1911
Heike Kamerlingh Onnes’s lab in Leiden saw very cold mercury lose all electrical resistance.
Sources and checks
Checked 2026-11-01: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify, or content-verify-pdf for PDFs); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.
“Heike Kamerlingh Onnes discovered superconductivity on 8 April 1911.”Leiden University — original institutional newsletter,13April2011: source, retrieved 2026-10-30; quote re-found by the server check
“On this day in 1911, Dutch physicist Heike Kamerlingh Onnes discovered superconductivity”American Institute of Physics, Physics Today — original Date in History article: source, retrieved 2026-10-30; quote re-found by the server check
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