Isotope data strengthens suspicions of ivory stockpile theft

In January 2019, a seizure of 3.3 tons of ivory in Uganda turned up something surprising: markings on some of the tusks suggested that they may have been taken from a stockpile of ivory kept, it was thought, strictly under ...

What comes after the Higgs boson

Ten years ago this week, two international collaborations of groups of scientists, including a large contingent from Caltech, confirmed that they had found conclusive evidence for the Higgs boson, an elusive elementary particle, ...

Atmospheric helium levels are rising, research confirms

Scientists at Scripps Institution of Oceanography at UC San Diego used an unprecedented technique to detect that levels of helium are rising in the atmosphere, resolving an issue that has lingered among atmospheric chemists ...

Reassessing radon as a reliable groundwater tracer

All radioactive materials which naturally occur in water will produce at least one isotope of radon as a decay product. As radioactive atoms are transported through groundwater aquifers in the form of gaseous radon, they ...

Search for sterile neutrinos: It's all about a bend in the curve

There are many questions surrounding the elementary particle neutrino, in particular regarding its mass. Physicists are also interested in whether besides the 'classic' neutrinos there are variants such as the so-called sterile ...

Nuclear physicist's voyage toward a mythical island

Theories were introduced as far back as the 1960s about the possible existence of superheavy elements. Their most long-lived nuclei could give rise to a so-called "island of stability" far beyond the element uranium. However, ...

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