Germ Theory of Disease
The germ theory of disease is the scientific theory that many illnesses are caused by microorganisms, living agents too small to see, that invade the…
byCapsule0 votes0 reviews4/4/2026
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The germ theory of disease is the scientific theory that many illnesses are caused by microorganisms, living agents too small to see, that invade the…
Water is a chemical compound with the formula H₂O, consisting of two hydrogen atoms covalently bonded to one oxygen atom. Its bent molecular geometry…
The human heart is a muscular pump, roughly the size of a clenched fist, that drives blood through the body every moment of life. Beating around…
The nature versus nurture debate asks how much of who we are, our intelligence, personality, talents, and behavior, comes from our genes, and how…
Dolphins are highly intelligent marine mammals, members of the same group as whales, found in oceans and some rivers around the world. Playful,…
Elephants are the largest living land animals, instantly recognisable by their long trunks, fan-like ears, and curving tusks. Three species survive…
Deoxyribonucleic acid (DNA) is the molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of…
A vaccine is a preparation that trains the immune system to recognize and fight a specific disease before the body is ever exposed to the real…
The tiger is the largest of all the cats and one of the most powerful and recognisable animals on Earth. With its burning orange coat marked by bold…
Pasteurization is the process of heating a food or drink to a specific temperature for a set length of time in order to kill harmful microorganisms…
The giant panda is a bear native to the mountain forests of central China, beloved worldwide for its distinctive black-and-white coat and gentle,…
Spontaneous generation was the long held belief that living organisms could arise directly from non living matter. People thought maggots formed from…
The domestic cat (Felis catus) is a small carnivorous mammal of the family Felidae, descended from the African wildcat and domesticated approximately…
The Nile crocodile is a large reptile found across much of Africa and the continent's largest freshwater predator. An ambush hunter that has changed…
Penicillin was the first true antibiotic, a medicine that kills bacteria and cures infections that had once been routinely fatal. Its discovery and…
Abiogenesis is the natural process by which life is thought to have arisen from non living matter, such as simple chemical compounds. How life first…
Evolution by natural selection is the scientific theory that explains how the diversity of life arose and continues to change. It holds that…
The great white shark (Carcharodon carcharias) is the largest predatory fish in the ocean and one of the most formidable hunters on Earth. Found in…
The giraffe is the tallest living animal on Earth, an unmistakable creature of the African savanna with its towering neck, long legs, and patchwork…
The gut-brain axis describes the bi-directional signalling between gut microbiota and the central nervous system via the vagus nerve, immune system,…