This is nice! A new surface dating tool using cosmogenic crypton in zircons. What's not to love!? 🌌💥🪨🏞️

A new analysis of fossils uncovered in Central Africa offers additional evidence that a human ancestor walked upright 7 million years ago, pushing back the date at which early hominins stood tall by about a million years.

Happy to share the long-awaited results of our community experiment comparing high-precision ID-TIMS U-Pb lab performance🧪⚒️ We do pretty well but as ever there is room for improvement 🤓 Stay tuned! doi.org/10.5194/gchr...

Interesting new Rb-Sr data and summary of the chronology of #Moon formation 🧪⚒️ tinyurl.com/2ztta42d

An unexpected discovery of IODP Exp 398! 200 m of ash from the Kos Plateau Tuff eruption buried in the basins around Santorini, read how it got there in our new paper in Science Advances 🌋 www.science.org/doi/10.1126/...

The Nuvvuagittuq Greenstone Belt— a complex geological sequence in northeastern Canada—harbors surviving fragments of Earth’s oldest crust, dating back to ~4.16 billion years old, according to a new Science study. Learn more: scim.ag/3FXN8sq

1456, the Duke of Milan established a medical institution dedicated to caring for the city’s poor and sick on a scale unprecedented in Europe. Admission was based on lack of income, not religious affiliation. It was the first secular hospital in Europe.. 🧪 www.science.org/content/arti...

New study in GChron led by Chetan Nathwani - looking at what controls the shape of #zircon U-Pb date distributions in magmatic rocks and what meaningful info they can provide ⚒️🧪 gchron.copernicus.org/articles/7/1...

#postdoc (or #phd) #jobalert The Experimental Planetology research group at @ethzurich.bsky.social is offering a Postdoc in Experimental Geochemistry and on the determination of liquid iron alloy densities with application to the Moon's and other planets core.

Cave folks - here some must-read for your weekend! 😛#speleothem, #caves, #volcano, #climate - what else you want?! 👇 @pucicu.de @olakwiecien3.bsky.social @cavesandclimate.bsky.social

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New study in PNAS: Apollo samples reveal that KREEP, the magma left after the #Moon was >99% solidified, formed 4.43 billion years ago. 🌘 This implies the Moon was born no later than ca. 140 My after the solar system’s birth. 🧪 ⚒️ @eth-eaps.bsky.social www.pnas.org/doi/10.1073/...

So how small are the zircons that we date in the lab? Here's a Fish Canyon Tuff zircon on a $5 bill for comparison!

Clever composite photo lets you see a side of the universe normally hidden to human vision. A camera tuned to hydrogen-alpha light reveals glorious interstellar clouds swirling around the familiar stars of the constellation Orion. (Photo: Włodzimierz Bubak) 🔭🧪 apod.nasa.gov/apod/ap24122...