200,000 years ago, humans preferred to sleep in beds

Researchers in South Africa's Border Cave, a well-known archeological site perched on a cliff between eSwatini (Swaziland) and KwaZulu-Natal in South Africa, have found evidence that people have been using grass bedding to ...

Fastest high-precision 3-D printer

3-D printers working in the millimeter range and larger are increasingly used in industrial production processes. Many applications, however, require precise printing on the micrometer scale at a far higher speed. Researchers ...

A new member in AIE family

Three molecules based on tetraphenyl-1,3-butadienes (TPBs) showed aggregation-induced emission (AIE) characteristics and sensitive conformational properties in which the emission wavelengths could be changed in different ...

US court weighs if climate change violates children's rights

In a courtroom packed with environmental activists, federal judges wrestled Tuesday with whether climate change violates the constitutional rights of young people who have sued the U.S. government over the use of fossil fuels.

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