Latest References
Autumn equinox 2025: When does fall begin?
REFERENCE Equinoxes occur twice a year, with night and day being almost the exact same length all across the world. The next equinox is the September fall equinox, beginning on Sept. 22, 2025 in North America.
How to watch Shark Week 2025: Live TV & streaming schedule for Discovery special
All the broadcast information, including full program guide and show synopses, so you can watch Shark Week 2025 from anywhere from July 20-26.
Nine best things to see in the night sky with binoculars: August to November 2025
Explore the wonders of the Northern Hemisphere’s night sky with our guide to the best celestial sights you can observe with binoculars between August and October 2025.
Aging: What happens to the body as it gets older?
Discover interesting facts about what happens to the body as it ages.
Hadrian's Wall: The defensive Roman wall that protected the frontier in Britain for 300 years
The wall is the largest Roman archaeological feature in Britain and was built to defend the northernmost limit of the Roman Empire.
Dementia: What are the signs and symptoms of dementia, and how is it treated?
Learn about dementia, how it affects people, how it's diagnosed and what treatments are available.
What is the Pacific Ring of Fire?
The Pacific Ring of Fire is a horseshoe-shaped belt of volcanoes known for explosive eruptions and intense earthquakes.
Who were the Huns, the nomadic horse warriors who invaded ancient Europe?
The Huns were nomadic horse warriors, originally from Asia, who invaded Europe in the late fourth century A.D. and carved out an empire that stretched from Asia to Europe.
