Euclid – News, Research and Analysis – The Conversation

LRG 3-757, or the Cosmic Horseshoe, where the yellow galaxy has magnified the light of the blue one farther away. NASA, ESA

August 20, 2025

The most powerful tool in an astronomer’s arsenal is a lens – but not the kind you might think

Tania Barone, Swinburne University of Technology

Everything bends space-time. Sometimes, we can even see this effect – and learn a lot from it.

A traveller puts his head under the edge of the firmament in the original (1888) printing of the Flammarion wood engraving.

April 30, 2024

Euclid telescope: A scientist tells us of his quest to understand the nature of dark matter and dark energy

Henk Hoekstra, Leiden University

Back when Henk Hoekstra started his PhD, atmosphere turbulence and optical imperfections prevented us from accurately observing dark matter. He tells us why Euclid is a game changer.

NASA/JPL-Caltech/ESA/Harvard-Smithsonian CfA

January 8, 2024

Dark energy is one of the biggest puzzles in science and we’re now a step closer to understanding it

Robert Nichol, University of Surrey

The nature of dark energy remains one of the biggest puzzles in cosmology.

While scissors congruence accurately captures the modern algebraic notion of 2D area, things get more complicated in higher dimensions. Maxine Calle

August 9, 2023

A brief illustrated guide to ‘scissors congruence’ − an ancient geometric idea that’s still fueling cutting‑edge mathematical research

Maxine Calle, University of Pennsylvania and Mona Merling, University of Pennsylvania

This is a story about geometry, algebra and many different dimensions, best read with construction paper, scissors and tape on hand.

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