Engineering
Scientists have found that concrete's compressive strength can be increased by 4.1% and its flexural strength by 3.4% by adding a small amount of coconut shell (only 5%). The material's performance increased by 6.1% compared ...
Oct 10, 2023
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Security
Hackers have stolen the personal data of potentially millions of people from the Philippines's national health insurer, which has urged members to change their passwords after the "staggering" cyberattack.
Oct 9, 2023
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Security
The fundraising software company Blackbaud agreed Thursday to pay $49.5 million to settle claims brought by the attorneys general of all 50 states related to a 2020 data breach that exposed sensitive information from 13,000 ...
Oct 5, 2023
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Energy & Green Tech
Concrete sidewalks, black asphalt streets, traffic, brick and steel buildings. These common city elements can retain heat and increase temperatures in a phenomenon called the urban heat island effect.
Sep 30, 2023
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Engineering
Material used in organic solar cells can also be used as light sensors in electronics. This has been shown by researchers at Linköping University, Sweden, who have developed a type of sensor able to detect circularly polarized ...
Sep 28, 2023
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Energy & Green Tech
Ships carry around 90% of traded goods and emit about 3% of global CO₂. The International Maritime Organization (IMO), the UN agency responsible for regulating shipping, recently set out plans for this industry to reach ...
Sep 28, 2023
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Electronics & Semiconductors
The sun sends enormous amounts of energy to the earth. Nevertheless, some of it is lost in solar cells. This is an obstacle in the use of organic solar cells, especially for those viable in innovative applications. A key ...
Sep 26, 2023
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Energy & Green Tech
The solar energy revolution is well underway. The share of solar power in the global energy mix has nearly tripled over the past five years, and solar panel technology is increasingly cheap, with utility-scale costs falling ...
Sep 26, 2023
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Energy & Green Tech
Researchers have found how to convert cost free forest waste, like pine cones, into carbon materials useful for energy storage. The method allows for easy and environmentally friendly dispersion of carbon in water, even when ...
Sep 25, 2023
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22
Internet
Each day, you leave digital traces of what you did, where you went, who you communicated with, what you bought, what you're thinking of buying, and much more. This mass of data serves as a library of clues for personalized ...
Sep 22, 2023
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In biology, an organism is any living system (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many billions of cells grouped into specialized tissues and organs. The term multicellular (many-celled) describes any organism made up of more than one cell.
The terms "organism" (Greek ὀργανισμός - organismos, from Ancient Greek ὄργανον - organon "organ, instrument, tool") first appeared in the English language in 1701 and took on its current definition by 1834 (Oxford English Dictionary).
Scientific classification in biology considers organisms synonymous with life on Earth. Based on cell type, organisms may be divided into the prokaryotic and eukaryotic groups. The prokaryotes represent two separate domains, the Bacteria and Archaea. Eukaryotic organisms, with a membrane-bounded cell nucleus, also contain organelles, namely mitochondria and (in plants) plastids, generally considered to be derived from endosymbiotic bacteria. Fungi, animals and plants are examples of species that are eukaryotes.
More recently a clade, Neomura, has been proposed, which groups together the Archaea and Eukarya. Neomura is thought to have evolved from Bacteria, more specifically from Actinobacteria.
This text uses material from Wikipedia, licensed under CC BY-SA
