Laughing can trigger coughing due to rapid diaphragm contractions and airway irritation; it's usually harmless but may indicate underlying health issues like asthma or acid reflux.
In 1947, Thor Heyerdahl led a daring expedition across the Pacific Ocean on a balsa wood raft to prove ancient South Americans could have settled Polynesia.
Salt melts ice by lowering the freezing point of water, creating a saltwater solution that keeps ice from forming or staying frozen even below 32°F (0°C).
Labradors live 10-12 years on average, with some reaching 14+ years; diet, exercise, and genetics are key factors, and proper care can extend their lifespan.
Train wheels, designed with conical shapes and flanges, evolved from simple designs to high-tech marvels to ensure smooth, safe turns and staying on tracks.
Red 40 is a widely used synthetic food dye in many products like candies, beverages, and cereals, but there are growing concerns and discussions about its potential health risks and safety, leading some places to consider bans, especially in children's food.
Chimpanzees, our closest relatives sharing 98% of our genes, are intelligent and social animals facing threats like habitat loss and hunting in Africa.
Hippos, massive and water-loving, play key roles in their ecosystems and display unique physical and behavioral adaptations.
Horned toads are spiky lizards from North and Central America, not toads; they use puff-up, camouflage, and blood squirting as defenses, but face habitat loss.
In 1860, the U.S. had 4 million slaves, making up 12.8% of the population, largely in Southern states, leading to tensions that sparked the Civil War.