SCIENCE

Ask Ethan: Can we fix the worst prediction in all of science? | by Ethan Siegel | Starts With A Bang! | Jul, 2025

In theory, every quanta within each quantum field theory has a spectrum of excitations it can occupy, and those excitations…

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Jupiter endangers Earth, and may have extincted the dinosaurs | by Ethan Siegel | Starts With A Bang! | Jul, 2025

Earth, as well as all planets and moons with rocky surfaces, has experienced a large number of collisions from objects…

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Did JWST catch the Ring Nebula forming new planets? | by Ethan Siegel | Starts With A Bang! | Jul, 2025

Mercury, Venus, and likely Earth will all be devoured. During the main phase of a star’s life, planets can orbit…

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Ask Ethan: Could the CMB arise from galaxies, not the Big Bang? | by Ethan Siegel | Starts With A Bang! | Jul, 2025

This selection of 55 galaxies from the JWST’s GLASS Early Release Science program spans a variety of ranges in redshift…

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JWST’s early galaxies didn’t break the Universe. They revealed it. | by Ethan Siegel | Starts With A Bang! | Jul, 2025

This deep-field view of the Universe showcases a portion of the COSMOS-Web field acquired with JWST. In this field are…

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Ask Ethan: What puzzles can the Vera Rubin Observatory help solve? | by Ethan Siegel | Starts With A Bang! | Jul, 2025

This image, taken in April of 2025, shows the completed and operational Vera C. Rubin Observatory with its dome open…

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Ask Ethan: Is the Hubble tension a real problem? | by Ethan Siegel | Starts With A Bang! | Jun, 2025

The construction of a cosmic distance ladder begins with measuring the parallax of individual stars within the Milky Way and…

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ANITA did see weird particles, but not parallel Universes | by Ethan Siegel | Starts With A Bang! | Jun, 2025

In inflationary cosmology, the volume that space occupies is stretched to an inconceivably large volume in a tiny fraction of…

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Could supermassive black holes anchor the tiniest galaxies? | by Ethan Siegel | Starts With A Bang! | Jun, 2025

At the centers of galaxies, orbiting stars experience close interactions with the central supermassive black holes at a galaxy’s core.…

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Ask Ethan: Does cosmic inflation violate energy conservation? | by Ethan Siegel | Starts With A Bang! | Jun, 2025

When the Universe undergoes a period of cosmic inflation, the fabric of space — which has a tremendously high energy…

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