Readily available thermoelectric generators operating under modest temperature differences can power CO2 conversion, according to a proof-of-concept study by chemists. The findings open up the intriguing possibility that the temperature differentials encountered in an array of environments — from a typical geothermal installation on Earth to the cold, desolate surface of Mars — could power the conversion of CO2 into a range of useful fuels and chemicals.

In their peer-reviewed work, Calcea Johnson and Ne’Kiya Jackson present five new ways of proving Pythagoras’ Theorem via trigonometry. They also detail a new method for finding proofs that yield at least five more.

In the 1990s, the San Miguel Island fox nearly went extinct, with numbers dropping to just 15. A recovery program increased their population by 2010, but from 2014 to 2018, it fell to 30% of its peak due to a new acanthocephalan parasite, exacerbated by a prolonged drought. A research effort employed morphological and molecular methods, alongside necropsy records, to identify the parasite and assess its health impacts on the foxes.

Scientists paint a compelling picture of what happened the day the S2 meteorite crashed into Earth 3.26 billion years ago.