The Case for DDT - Science News
Jan 17, 2003 · First created in the late 19th century, dichlorodiphenyltrichloroethane’s insecticidal properties weren’t discovered until around 1939. Almost at once, communities throughout the developed...
Breaking new ground in the search for dark matter
Aug 7, 2020 · The LHC has been trying to make it by colliding beams of protons. Some experiments are using telescopes in space and on the ground to look for indirect signals of dark-matter particles as they collide and break themselves …
Dark Energy and Dark Matter | Center for Astrophysics | Harvard ...
Dark Energy and Dark Matter. All the atoms and light in the universe together make up less than five percent of the total contents of the cosmos. The rest is composed of dark matter and dark …
What Is Dark Matter? - Nature
May 9, 2018 · Physicists and astronomers have determined that most of the material in the universe is “dark matter”—whose existence we infer from its gravitational effects but not through electromagnetic...
Dark matter - Wikipedia
In astronomy, dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be observed. Such effects occur in the context of formation and evolution of galaxies, gravitational lensing, the observable universe's current st…
Wikipedia · Text under CC-BY-SA licenseDark matter - CERN
Dark matter candidates arise frequently in theories that suggest physics beyond the Standard Model, such as supersymmetry and extra dimensions. One theory suggests the existence of a “Hidden Valley”, a parallel world made of dark …
Bedside Manners 10: Dark Matter - Apple Podcasts
May 12, 2023 · Bedside Manners 10: Dark Matter. Grim & Mild Presents. Play . Everyone poops. And for thousands of years, as civilizations have risen and fallen, humans have been trying to …
Dark matter | Definition, Discovery, Distribution,
Oct 1, 2024 · dark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter-energy composition of the universe; the …
Dark Matter & Dark Energy - Science@NASA
Matter is defined as any substance that has mass and occupies space. But there’s more to the universe than the matter we can see. Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and …
Shining a Light on Dark Matter - NASA Science
The invisible form of matter, called dark matter, makes up roughly 30% of the universe’s total mass. Its gravity drives normal matter (gas and dust) to collect and build up into stars, galaxies, and massive galaxy clusters.
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