Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving media. Video was first developed for mechanical television systems, which were quickly replac
The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centur
Exercise is a body activity that enhances or maintains physical fitness and overall health and wellness.It is performed for various reasons, including weight loss or maintenance, to aid growth an
A scientist is a person who researches to advance knowledge in an area of the natural sciences.In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers
A student is a person enrolled in a school or other educational institution.In the United Kingdom and most commonwealth countries, a "student" attends a secondary school or higher (e.g., college or
Knowledge is a form of awareness or familiarity. It is often understood as awareness of facts or as practical skills, and may also mean familiarity with objects or situations. Knowledge of facts, al