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On This Day (20th May 1965): Cosmic background of microwaves are discovered
Arno Penzias and Robert Woodrow Wilson at the Crawford Hill location of Bell Telephone Laboratories in nearby Holmdel Township, New Jersey had built a Dicke radiometer that they intended to use for radio astronomy and satellite communication experiments. On 20 May 1964 they made their first measurement clearly showing the presence of the microwave background, with their instrument having an excess 4.2K .Recent Articles
DONHARRISSITE, OTWAYITE AND OTHER SECONDARY NICKEL MINERALS AT THE MINA EUGENIA, BELLMUNT DEL PRIORAT, TARRAGONA, CATALUNYAABELLA I CREUS, JOAN - 8th May 2026
Mnemonics: Stalactite vs. StalagmiteEd Clopton - 11th May 2026
MAWBYITE, SCHULTENITE, NICKELLOTHARMEYERITE AND OTHER NEW MINERAL FINDS IN CATALUNYAAbella i Creus, Joan - 11th May 2026
Mindat.org Chinese Newsletter now availableJolyon Ralph - 10th May 2026
From Specimens to Data: How Mineral Collecting Is EvolvingBill Hamel - 9th May 2026- More ArticlesClick here to see more recent articles
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