The Archimedes screw, an ancient device named after the Greek thinker Archimedes, efficiently moves water uphill and is still used today for irrigation, wastewater management, and even electricity generation.
Harvard, Stanford, and MIT offer free online courses in various fields, providing flexible, high-quality education from home, benefiting both hobbyists and professionals.
The Taino were the first people Columbus met in the Americas; they had rich cultures and societies in the Caribbean, which were deeply impacted by European contact.
The United States, made up of 50 unique states with distinct names, capitals, and populations, forms a diverse nation with various geographical and cultural traits.
Dolphins may protect humans from sharks to defend themselves or their young, though they have been known to guide swimmers to safety and show empathy.
Top programs to learn Spanish effectively include Duolingo with its fun, engaging lessons, and Babbel with its flexible course formats and real-life topics.
Hidden in northern Guatemala's jungles, El Mirador is an ancient Maya city famous for its vast pyramids, particularly La Danta, that thrived from 600 BC to 150 AD.
Professional development via webinars is essential for educators, offering strategies to enhance student engagement and create inclusive classrooms.
Ammonites were extinct marine cephalopods with coiled, chambered shells that thrived 416-66 million years ago, helping scientists study ancient Earth's oceans.
The best detergents for colored clothes are specially made to protect dyes and prevent fading, often labeled with 'color protection' or 'for darks'.
