The Universe Has a Background Glow of Microwave Radiation

Sound travels at approximately 343 m/s in air at 20°C, but reaches about 1,484 m/s in seawater — over 4 times faster. Water's greater density and incompressibility allow molecules to transfer vibrations more efficiently. This is why humpback whales can communicate over thousands of kilometers through the ocean.

The Atacama Large Millimeter Array (ALMA), located in Chile's Atacama Desert at 5,000 meters altitude, is the world's most powerful radio telescope. Chile hosts about 40% of the world's astronomical infrastructure because its high-altitude, low-humidity, pollution-free skies are ideal for stargazing. Future telescopes including the Extremely Large Telescope (ELT) are also being built in Chile.

On March 1, 1896, French physicist Henri Becquerel accidentally discovered radioactivity while studying phosphorescence. He found that uranium salts emitted rays capable of exposing photographic plates without any light source — entirely on their own. This discovery overturned established views of matter and energy, and later earned him a share of the 1903 Nobel Prize in Physics alongside Marie and Pierre Curie.

The clear, dry skies of the Atacama Desert, coupled with high altitudes and minimal light pollution, create ideal conditions for stargazing. This makes Chile a global hub for ground-based astronomy, attracting major international observatories.