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In this video, after discussing why certain ancient coins are worth millions, I meet the most valuable coin of all: the famous EID MAR aureus issued by Brutus to commemorate the assassination of Julius Caesar.This video was made possible by the generosity of Numismatica Ars Classica, who very kindly allowed me to visit their London office and handle these coins. You can find out more about NAC and the coins displayed in this video here: https://www.arsclassicacoins.com/Someone put a Hole in this Coin - now it's worth Millions (the EID MAR aureus)May 27, 2022 | toldinstone

A microscopic close-up of the copper surface. (Smith et al., Biomaterials, 2021) ========================================================================= Copper is well known for being able to kill off bacteria that it comes into contact with – the metal releases ions that are toxic to bacterial cells, punching through their outer membranes. However, this process usually takes several hours. A newly developed copper surface does the job in just a couple of minutes, though, some 120 times faster than normal copper. The less time the bacteria hang around, of course, the safer that surfaces like door handles and worktops are going to be. The scientists behind...

Leaves of the European chestnut (Castanea sativa) contain ingredients with the power to block the virulence and pathogenesis of Staphylococcus aureus without detectable resistance, a new study has found. Rather than killing Staphylococcus aureus, the chestnut leaf extract — rich in oleanene and ursene derivatives (pentacyclic triterpenes) — works by taking away bacteria's weapons, essentially shutting off the ability of the bacteria to create toxins that cause tissue damage. "We have demonstrated in the lab that our extract disarms even the hyper-virulent MRSA (methicillin-resistant Staphylococcus aureus) strains capable of causing serious infections in healthy athletes," said Dr Cassandra Quave of...