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There are multiple ways to form black holes. The one most commonly taught in high school physics classes is that they are created from the collapse of a dying star. But there are another class of black holes, known as Primordial Black Holes (PBHs) that could have been created immediately after the Big Bang by matter collapsing in on it. Or that’s the theory at least. Though long theorized, we’ve never actually seen one of them, though scientists have suggested that they might account for the missing mass of the universe, which we otherwise describe as “dark matter”. But a new paper, available in pre-print on arXiv from researchers at Oakland University in Michigan and Rice University in Texas, calls that theory into question, at least for a certain type of PBH.

Two people were the first to receive the therapy for a condition that damages the spinal cord and optic nerve

When does your brain reach adulthood? We're now understanding the many ways the organ continues to mature decades after society first deems you an adult

When does your brain reach adulthood? We're now understanding the many ways the organ continues to mature decades after society first deems you an adult

Mars researchers are wrestling with the potential costs of a flashy new NASA mission to the Red Planet

Knowing what kind of tick bit you and where you got it can help inform next steps

The next generation of AI models are meant to be trained by people paid to have conversations with them, but several of these workers have admitted to New Scientist that they simply get chatbots to do it instead. This "AI inbreeding" may reduce the power and usefulness of future models, warn experts

The next generation of AI models are meant to be trained by people paid to have conversations with them, but several of these workers have admitted to New Scientist that they simply get chatbots to do it instead. This "AI inbreeding" may reduce the power and usefulness of future models, warn experts

What’s going on with the Ebola outbreak, how the World Cup is dealing with rising temperatures, and how becoming a father can change your brain

The ESA Open Days season is almost here and our teams across our establishments in Europe are already gearing up, preparing to give thousands of visitors a truly special experience.

Earth Observatory

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3. Signs of Thaw in the Bering Sea

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Earth Observatory

1. Science
2. Earth Observatory
3. Signs of Thaw in the Bering Sea

• Earth
• Earth Observatory
• Image of the Day
• EO Explorer
• Topics
• More Content
• About

What's happening to this Sun-crossing rocket?

Preliminary study finds that testosterone levels increase or stabilize in people taking GLP-1 medications

Fathers show changes in some of the same brain areas as mothers, but the effect of parenthood on dads isn’t nearly as well studied

From tiny hamsters to giant salamanders, here are some of the most unusual examples of fatherhood across the animal kingdom

Understanding the Martian moon of Phobos’ origin hinges on decoding its interior. Japan’s Martian Moons Exploration (MMX) mission due for launch in late 2026 should help.

On its way to future encounters with Trojan asteroids, the Lucy spacecraft made a practice run past tiny asteroid 52246 Donaldjohanson on April 20, 2025. Now, the Lucy team, led […]

The post Lucy's First Asteroid Flyby Sheds Light on a Double-lobed Asteroid appeared first on Sky & Telescope.

Influencers and ultra-rich people looking to extend their lifespan are trading tips and tricks on how to eke out extra years