SMRTR Science & EngineeringSep 3, 2025Interesting Engineering

Magnetic fields billion times weaker than a fridge magnet shaped early universe

SMRTR summary

New research reveals primordial magnetic fields in the early universe were billions of times weaker than fridge magnets—comparable to human brain neuron magnetism. An international team used 250,000 computer simulations to confirm these weak fields (0.2 nano-gauss) shaped the cosmic web structure, accelerating star and galaxy formation despite their subtle strength.

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