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Sustained scientific debate, sometimes scientific controversy [1] or persistent disagreement, [2] is any a substantial disagreement among scientists. A scientific controversy may involve issues such as the interpretation of data , which ideas are most supported by evidence , and which ideas are most worth pursuing.
The Vera C. Rubin Observatory is expected to begin science operations in late 2025. [15] [16] Science-related budgets US: Various details about planned science-related spending for 2025 have been described with some information on the planned research subjects or areas. [17] [18]
Hazard research is published: a study assesses the global extent of PFAS contamination of surface waters and groundwaters, finding many samples exceed PFAS drinking water guidance values and a "need to better understand the use, fate and impacts of anthropogenic chemicals" (8 April), [261] a study estimates how much carbon soils store globally ...
Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.
A time crystal can be informally defined as a time-periodic self-organizing structure. While an ordinary crystal is periodic (has a repeating structure) in space, a time crystal has a repeating structure in time. A time crystal is periodic in time in the same sense that the pendulum in a pendulum-driven clock is periodic in time.
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In addition, physical properties are often controlled by crystalline defects. The understanding of crystal structures is an important prerequisite for understanding crystallographic defects. Most materials do not occur as a single crystal, but are poly-crystalline in nature (they exist as an aggregate of small crystals with different orientations).
This is a list of Wikipedia articles deemed controversial because they are constantly re-edited in a circular manner, or are otherwise the focus of edit warring or article sanctions. This page is conceived as a location for articles that regularly become biased and need to be fixed, or articles that were once the subject of an NPOV dispute and ...