Astronomers at the Leiden Observatory have carried out the most precise gravity measurements ever made, using new software they developed specially. Their new code has been accepted for publication in The Astrophysical Journal Letters.
In 71% of all songbird species with available data, the female sings too. This is remarkable because in the wake of Darwin’s theory of evolution, birdsong has generally been seen as a characteristic of male birds, allowing them to compete with other males and attract females. Leiden biologist Katharina Riebel published this finding on 4 March in Nature Communications, together with an international team.
Six students of archaeology, history and art history are to follow the Silk Route in Central Asia, looking for evidence from ancient history for the enormous cultural exchange brought about by this trade route. They are conducting their research for the exhibition on the Silk Route that opened in the Hermitage in Amsterdam on 1 March.