Psychology & Psychiatry

Science-backed tips for maximizing play time with kids

Years of cognitive development research have uncovered a wealth of knowledge about what children need to grow, thrive and learn—but it's also important to translate those insights into real-world applications.

Diseases, Conditions, Syndromes

Iran COVID deaths hit yet another high

Iran announced more than 700 deaths from the coronavirus Tuesday, yet another high for the Islamic republic as it struggles to contain a surge in infections.

Psychology & Psychiatry

Study gauges social responsibility in slowing COVID-19 spread

Uncertainty and anxiety generated by the COVID-19 pandemic motivated social psychologist Evelyn Vázquez at the University of California, Riverside, to collaborate with UCR Healthy Campus on a study to identify safety measures ...

Neuroscience

When the brain's GPS goes off the grid

In a new study published in Nature today, Weizmann Institute of Science researchers, in collaboration with colleagues from the Hebrew University of Jerusalem, unveiled for the first time how three-dimensional space is represented ...

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Space

Space is the boundless, three-dimensional extent in which objects and events occur and have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of the boundless four-dimensional continuum known as spacetime. In mathematics spaces with different numbers of dimensions and with different underlying structures can be examined. The concept of space is considered to be of fundamental importance to an understanding of the universe although disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.

Many of the philosophical questions arose in the 17th century, during the early development of classical mechanics. In Isaac Newton's view, space was absolute - in the sense that it existed permanently and independently of whether there were any matter in the space. Other natural philosophers, notably Gottfried Leibniz, thought instead that space was a collection of relations between objects, given by their distance and direction from one another. In the 18th century, Immanuel Kant described space and time as elements of a systematic framework which humans use to structure their experience.

In the 19th and 20th centuries mathematicians began to examine non-Euclidean geometries, in which space can be said to be curved, rather than flat. According to Albert Einstein's theory of general relativity, space around gravitational fields deviates from Euclidean space. Experimental tests of general relativity have confirmed that non-Euclidean space provides a better model for explaining the existing laws of mechanics and optics.

This text uses material from Wikipedia, licensed under CC BY-SA