In October 1957, a beachball-sized aluminium sphere called Sputnik 1 began sending 0.3-second pulses on two radio frequencies from orbit, signals amateur operators around the world could receive, making the space age suddenly audible from EarthJuly 28, 2026
When a lightning return stroke heats a channel only centimetres wide to roughly 30,000 kelvin, about five times the temperature of the Sun’s visible surface, the air expands so violently that the pressure wave rolls across the ground as thunderJuly 28, 2026
In October 1957, a beachball-sized aluminium sphere called Sputnik 1 began sending 0.3-second pulses on two radio frequencies from orbit, signals amateur operators around the world could receive, making the space age suddenly audible from Earth Saving Tips July 28, 2026 On 4 October 1957, a polished aluminium sphere 58 centimetres wide began circling Earth and sending a repetitive electronic pulse…
