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Black hole singularity is a surface not a point
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Black hole singularity is a surface not a point

Hacker News·about 1 month ago
#iZPLxxQk
#arxiv#black#hole#singularity#surface#quantum

It is widely repeated in the popular literature and elsewhere that the singularity at the center of a black hole is a point. It is not true. Two observers who free-fall into a spherical black hole along two different angular trajectories at the same time…

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Sperm Whales blow bubbles to achieve restful, vertical sleep
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Sperm Whales blow bubbles to achieve restful, vertical sleep

Hacker News·2 months ago
#Mjat9Wcr
#news#whales#sperm#surface#buoyancy#resting

New research from the University of St Andrews and Université de Neuchâtel, has uncovered the mechanism which allows sperm whales to sleep in a unique vertical position, just under the ocean surface.

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Microsoft builds its ultimate MacBook Pro rival with the NVIDIA powered Surface Laptop Ultra
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Microsoft builds its ultimate MacBook Pro rival with the NVIDIA powered Surface Laptop Ultra

Hacker News·4 months ago
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Microsoft launches the Surface Laptop Ultra with an NVIDIA RTX Spark chip and 128GB unified memory to challenge Apple MacBook Pro dominance.

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Microsoft Surface Laptop Ultra weilds Nvidia's RTX Spark superchip with 128GB of RAM, 20 Arm CPU cores, and a Blackwell GPU — 15-inch mini-LED PixelSense Ultra display rounds out the powerful package
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Microsoft Surface Laptop Ultra weilds Nvidia's RTX Spark superchip with 128GB of RAM, 20 Arm CPU cores, and a Blackwell GPU — 15-inch mini-LED PixelSense Ultra display rounds out the powerful package

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Gold keeps glittering courtesy of surface chemistry
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Gold keeps glittering courtesy of surface chemistry

Nature·4 months ago
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Hexagonal patterns on the surface of gold crystals are an unfavourable environment for reactions. Hexagonal patterns on the surface of gold crystals are an unfavourable environment for reactions.

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