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How to simulate softness

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What factors affect how human touch perceives softness, like the feel of pressing your fingertip against a marshmallow, a piece of clay or a rubber ball? By exploring this question in detail, researchers discovered clever tricks to design materials that replicate different levels of perceived softness. The findings provide fundamental insights into designing tactile materials […]

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Evidence for past high-level sea rise

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Scientists, studying evidence preserved in speleothems in a coastal cave, illustrate that more than three million years ago — a time in which the Earth was two to three degrees Celsius warmer than the pre-industrial era — sea level was as much as 16 meters higher than the present day.

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Early start of 20th century Arctic sea ice decline

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Arctic sea-ice has decreased rapidly during the last decades in concert with substantial global surface warming. Both have happened much faster than predicted by climate models, and observed Arctic warming is much stronger than the global average. Projections suggest that Arctic summer sea-ice may virtually disappear within the course of the next fifty or even […]

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Storage and release of mechanical waves without energy loss

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A new discovery could allow light and sound waves to be stored intact for an indefinite period of time and then direct it toward a desired location on demand. Such a development would greatly facilitate the ability to manipulate waves for a variety of desired uses, including energy harvesting, quantum computing, structural-integrity monitoring, information storage, […]