Nitrate can release uranium into groundwater

A team has experimentally confirmed that nitrate, a compound common in fertilizers and animal waste, can help transport naturally occurring uranium from the underground to groundwater. The new research backs a previous study showing that aquifers conta…

Vocal tract size, shape dictate speech sounds

Researchers explore how anatomical variations in a speaker’s vocal tract affect speech production. Using MRI, the team recorded the shape of the vocal tract for 41 speakers as the subjects produced a series of representative speech sounds. They average…