Magnetism: An Invisible Force

Magnetism is a physical phenomenon produced by the motion of electric charge, leading to attractive and repulsive forces between objects. It's invisible yet responsible for guiding compass needles and powering electrical motors.

Earth itself acts like a huge magnet with a magnetic field extending thousands of kilometers into space. This geomagnetic field protects us from solar winds and cosmic rays, playing a vital role in sustaining life.

Magnetic fields aren't just limited to planets and stars; they pervade the entire cosmos. They help shape the structure of galaxies and influence the dynamics of cosmic dust, star formation, and even black holes.

Some animals, like migratory birds, sea turtles, and bees, have a magnetic sense that allows them to navigate using Earth's magnetic field, a phenomenon still not fully understood by scientists.

At the quantum level, magnetism arises from the spin and orbital movements of electrons. Quantum magnetism is a key player in revolutionary technologies, including quantum computing and advanced magnetic materials.

Unlike poles in a magnet, which come in pairs, magnetic monopoles are hypothetical single poles that have never been observed. Their existence would have profound implications for particle physics and our understanding of the universe.

Superconductors can expel magnetic fields, a phenomenon called the Meissner effect. This property is exploited in technologies like MRI machines and maglev trains, highlighting the interplay between magnetism and superconductivity.

Dogs tend to align their bodies with Earth's magnetic field when they relieve themselves, a behavior observed in over 70 breeds.