Using time dilation to measure curvature of space-time

A team of researchers working at Stanford University has used time dilation in an atomic fountain to measure the curvature of space-time. In their study, reported in the journal Science, the group used the fountain as an ...

Moth balls thrust satellites into space

The chemical in moth balls, naphthalene, will be tested in space in a new satellite rocket propulsion system, Bogong, developed at The Australian National University (ANU).

Ranked lists skew decision-makers' choices toward top option

In an age of online restaurant reviews and product ratings, landing in first place on a "top 10" list can confer great benefits on the top-ranked option, magnifying the differences between it and all other choices and blinding ...

Chip-based optical tweezers levitate nanoparticles in a vacuum

Researchers have created tiny chip-based optical tweezers that can be used to optically levitate nanoparticles in a vacuum. Optical tweezers—which employ a tightly focused laser beam to hold living cells, nanoparticles ...

Levi­tating particles in a vacuum

Levitation of both large objects and of single atoms has become a widely used technique in science and engineering. In the last years, many researchers have started to explore a new horizon: the levitation of nano- and micro-particles—still ...

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