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HIV/AIDS: Facts about the viral infection that attacks the immune system
Learn how HIV spreads, how it affects the body and what treatments are available.
The sun: Facts about the bright star at the center of the solar system
Discover interesting facts about the sun, the solar system's central star that supports all life on Earth.
Human evolution: Facts about the past 300,000 years of Homo sapiens
Discover interesting facts about the origin of the human species and what makes us different from our ape cousins.
Best running shoes for supination 2025: Find the perfect fit for your feet
Buyers guide These are the best running shoes you can buy in every category, from New Balance 1080 v14 and Brooks Glycerin 20 to Hoka Mach X.
The history of cat domestication
Discover the history of our feline friends, and learn about the debate over whether cats are really "domesticated" at all.
Sleep: Facts about how and why we sleep
Learn facts about sleep, during which the body rests, recuperates and performs essential repairs.
Particle physics: Facts about the elementary particles that make up our universe
Discover the fascinating world of particle physics — the most fundamental building blocks of the universe and the forces that connect them.
Black holes: Facts about the darkest objects in the universe
Discover interesting facts about what black holes are, how they form and what would happen if you fell into one.
