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news Earth Evidence status: Peer reviewed · Modelling study

Great Unconformity: a vanished cliff may explain the Grand Canyon’s missing billion years

A Geology paper models a kilometre-high cliff formed as Rodinia broke apart about 800–750 million years ago, estimating it stripped up to 8 km of rock near its edge but 2 km or less some 200 km away.

What it does not show The escarpment no longer exists; its size, position and erosion are reconstructed, and competing glacial and tectonic explanations remain

By Murad Ali Khan 9 min read
Concept illustration of an atomic matter wave splitting into held and freely falling paths above an atom chip

News Physics Evidence status: Peer reviewed · Quantum interferometry experiment

Falling Quantum Atoms Pass a New Test of Einstein’s Gravity

An atom-chip experiment measured the quantum phase of freely falling rubidium atoms and found behavior consistent with Einstein’s equivalence principle.

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Essential explainers

Durable answers with the numbers, the method and the caveats in one place.

Explainer Biology

Can Identical Twins Have The Same DNA?

The physical similarities and shared genetic origins of identical twins have always engrossed scientists and the public. They are born from a…

Explainer Health

Aging Occurs In Two Bursts Of Human Life

According to Stanford Medicine research humans do not experience aging in a steady cycle of linear changes, instead we experience bursts of…