PDF for physics from the official Punjab Board website. Access chapter-wise details for physics with the link to download the ...

Earth’s magnetic field strength and atmospheric oxygen levels have oscillated in tandem for around 540 million years, according to a NASA-led study, pointing to a deep-Earth process that could knit ...

Earth’s magnetic field has correlated with fluctuations in atmospheric oxygen, according to a newly released study.

Two German physicists have unveiled a compact magnet layout that outperforms the famed Halbach array, delivering stronger, ...

Geologic records reveal that magnetic field strength and oxygen levels rise and fall together, implying deep-Earth processes ...

Antennas installed at 18 U.S. high schools detected bursts of radio activity that can precede solar disturbances capable of ...

New NASA research demonstrates that 540 million years of Earth’s magnetic field changes have corresponded to surface ...

Scientists convert Earth's magnetic field collapse from 41,000 years ago into chilling audio, revealing ancient cosmic ...

A rare geological event occurs every 300,000 years or so: the Earth’s magnetic poles flip. The magnetic poles are the two ...

The near-field shielding effectiveness (SE) of a material can be measured by placing it between two closely spaced dipoles (electric or magnetic) and noting the resulting insertion loss. An ...

More information: Weijia Kuang et al, Strong link between Earth's oxygen level and geomagnetic dipole revealed since the last 540 million years, Science Advances (2025). DOI: 10.1126/sciadv.adu8826 ...

That paired heartbeat is the bombshell inside a new Science Advances study led by NASA Goddard geophysicist Weijia Kuang. Using a half-billion-year record, Kuang’s team shows the planet’s magnetic ...