Physicists create 3-D printed microboat

From prow to stern, this little boat measures 30 micrometers, about a third of the thickness of a hair. It has been 3-D-printed by Leiden physicists Rachel Doherty, Daniela Kraft and colleagues.

Earth's history sends climate warning

A new study of historical carbon dioxide levels stresses urgent action is needed to avoid prehistoric levels of climate change.

Scientists unknowingly tweak experiments

A new study has found some scientists are unknowingly tweaking experiments and analysis methods to increase their chances of getting results that are easily published.

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