PNAS Science Sessions

Stanislas Dehaene and Marie Amalric investigate whether short online videos are sufficient to teach mathematics concepts.

Anna Lea Albright and Peter Huybers describe how optical effects consistent with air pollution appear in the paintings of Claude Monet and J.M.W. Turner.

Kristin Winchell explains the genetic basis of anole adaptation to urban environments.

Researchers document animal extinctions in the Ediacaran Period that may have preceded the earliest known mass extinction.

Bo Wang and Chunpeng Xu describe how fossilized katydids provide insight into the role of insect sounds in the Mesozoic.

Tom McGrath describes how the neural network AlphaZero taught itself how to play chess without observing a human game.

Orit Peleg, Golnar Fard and Francisco López Jiménez explain how honeybees overcome geometric constraints to construct honeycombs.

Taylor Hersh explores how patterns of clicks produced by sperm whales suggest the exchange of cultural information between the whales.

Researchers discuss what animal soundscapes can tell us about the health of ecosystems.

Daniel Cusworth discusses combining aircraft-based and satellite-based measurement to identify methane emission point sources.