#630 Where did the Democratic and Republican parties come from?
Where did the Democratic and Republican parties come from? The come from one party called the Democratic-Republican Party, founded by Thomas Jefferson. […]
#629 What is the immortal hydra?
What is the immortal hydra? It is a tiny, freshwater creature that doesn’t appear to age. Hydra are very small invertebrates that […]
#628 When did people start using nails?
When did people start using nails? Bronze nails were used in Ancient Egypt in about 3,400 BC. Before people had nails, there […]
#627 How can giraffes have such long necks?
How can giraffes have such long necks? Giraffes have jointed vertebrae in their neck, a large amount of ligament, and an enormous […]
#626 What is the Great Attractor?
What is the Great Attractor? It is the theorized gravitational center of our Milky Way Galaxy and 100,000 other galaxies. The universe […]
#625 What causes Parkinson’s disease?
What causes Parkinson’s disease? It is caused by a loss of nerve cells in the basal ganglia part of the brain. Parkinson’s […]
#624 How do cactuses survive in the desert?
How do cactuses survive in the desert? They have adaptations in their roots, leaves, and stems that help them retain water and […]
#623 What are bruises?
What are bruises? They are where blood vessels near the skin’s surface are broken after an impact. There are three layers in […]
#622 What is the difference between DVD and Blu-Ray?
What is the difference between DVD and Blu-Ray? Their age, size, quality, audio, and the disc reading technology. DVD is an older […]
#621 How long do black holes last?
How long do black holes last? Black holes will slowly dissolve, but it will take far longer than the length of our […]