A human is a member of the species Homo sapiens, which is the only extant species of the genus Homo. Humans are primates, and they are characterized by their ability to use complex tools, their highly developed brains, and their capacity for language and abstract thought. Humans are one of the most successful and widespread species on Earth, and they are found in nearly every corner of the globe.
Humans have a long and complex history, and they have evolved over millions of years from earlier primates. The earliest known members of the Homo genus, such as Homo habilis and Homo erectus, lived between 2 and 1.5 million years ago. Homo sapiens, the species to which all modern humans belong, appeared around 300,000 years ago.
Throughout their history, humans have developed complex societies, cultures, and technologies. They have also had a profound impact on the natural world, both through the destruction of habitats and species and through the conservation and protection of the environment. Today, humans are the dominant species on Earth, and they continue to evolve and adapt to new challenges and opportunities.
Protein is a macronutrient that is essential for the proper functioning of the human body. It is a long chain of amino acids that is found in many of the body’s tissues, including muscles, bones, skin, hair, and nails. Proteins are involved in a wide range of bodily functions, including the structure and function of […]
A Moon landing is the arrival of a spacecraft on the surface of the Moon. This includes both crewed and robotic missions. The first human-made object to touch the Moon was the Soviet Union’s Luna 2, on 13 September 1959.
Dune is a 1965 science fiction book by American author Frank Herbert that was first published as two independent serials in Analog magazine. It shared the Hugo Award for Best Novel in 1966 with Roger Zelazny’s This Immortal, and it won the inaugural Nebula Award for Best Novel. It is the first episode in the
DNA damage occurs at a rate of 10,000 to 1,000,000 molecular lesions per cell each day as a result of environmental influences and normal metabolic activities within the cell. While this accounts for just 0.000165 percent of the human genome’s nearly 6 billion bases, unrepaired lesions in essential genes can impair a cell’s capacity to
Falcon 9 is a partially reusable two-stage-to-orbit medium-lift launch vehicle designed and manufactured by SpaceX in the United States. The latest version of the first stage can return to Earth and be flown again multiple times. Both the first and second stages are powered by SpaceX Merlin engines, using cryogenic liquid oxygen and rocket-grade kerosene
Operation Snowball is an international alcohol, tobacco and drug-use prevention program founded in Illinois in 1977, focusing on leadership development to encourage young people to avoid taking drugs. The name originates from the idea that having a positive impact on an individual can “snowball” into positive results for an entire community and beyond. Operation Snowball is part-funded by the Illinois Department of
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Insects (from Latin insectum) are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at
Born July 18, 1952 (age 69) Occupation Drug policy activist, publisher, author Website hr95.org Mikki Norris is an American drug policy activist, former publisher, and author, known for her work highlighting the human cost of the US War on Drugs. She co-authored, with husband Chris Conrad and Virginia Resner, Shattered Lives: Portraits From America’s Drug War and Human Rights and the US Drug War. Norris was
Ecology is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystems, and biosphere level. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology and natural history. Ecology is a branch of biology, and it is not synonymous with environmentalism.
Agriculture is the cultivation of plants and livestock. Agriculture was an important step in the growth of sedentary human civilization, since it produced food surpluses that allowed people to live in cities. Agriculture has been practiced for thousands of years. Beginning at least 105,000 years ago, fledgling farmers began to sow wild grains approximately 11,500