Guglielmo Marconi successfully transmitted radio signals over long distances and is widely recognized as the pioneer of practical wireless communication. His experiments laid the foundation for modern radio, television, and wireless technology.

Max Planck introduced quantum theory in 1900 while studying blackbody radiation. His work revolutionized modern physics by showing that energy is emitted in discrete packets called quanta, laying the foundation for quantum mechanics.

A supernova occurs when a star explodes violently at the end of its life cycle. This massive explosion releases enormous energy and can briefly outshine entire galaxies while spreading heavy elements into space that later form planets and stars.

When sodium bicarbonate (NaHCO₃), also known as baking soda, is heated, it decomposes and releases carbon dioxide gas (CO₂). The reaction also produces sodium carbonate and water, which is why baking soda is widely used in baking and fire extinguishers.

The Paris Climate Conference, also known as COP21, was held in 2015 in Paris, France. Countries from around the world adopted the Paris Agreement to limit global warming and reduce greenhouse gas emissions through international cooperation.