Maxwell published four equations describing electricity and magnetism in 1865. Before Maxwell, electricity and magnetism were separate lab curiosities. Ampère discovered magnetic field-current relationship in 1820. Faraday showed magnetic field can induce electric current in 1845
Einstein's photoelectric effect discovery was one of his great accomplishments. Bougainville may become independent after overwhelming majority voted for independence. Polar bears give birth to one baby annually and breastfeed it until mating season. U.S. economy grew 2.5% in second half of 2023
Vegetarian diet can provide all nutrients found in meat products. Low-fat meat can make meat and vegetarian diets similar. Vegetarians tend to eat more fruits, vegetables and grains. Social anxiety disorder causes constant fear of being evaluated
Galenus created first temperature standard in 170 AD using ice and boiling water. First sealed thermometer built by Ferdinand II in 1654. Fahrenheit developed mercury thermometer and scale in early 18th century
Sports equipment includes tools, materials, apparel and gear for specific sports. Football originated in ancient China during Warring States period. Equipment has evolved from animal skin to modern materials
Public speaking has significant cultural, religious, and political importance throughout history. Ancient Chinese philosopher Confucius advocated speeches affecting all audience members. Aristotle classified speeches into deliberative, forensic, and epideictic types. Ancient Greeks and Romans developed comprehensive rhetoric education systems