Jungus

Artists Michelle McSwain and Ryan Warnberg (who go by MRI) demonstrate how to paint with light. The premise: combine LED lights with long photographic exposures. Vision expert Stephen Macknik, of the Barrow Neurological Institute, explains what the light paintings teach us about our visual system.

In 1959, two scientists coined the word “pheromone” to describe the chemicals used for communication between members of the same species. Tristram Wyatt, author of an essay in Nature detailing the history of pheromone science, highlights research milestones.

This week, astronomers reported finding methane gas in the Martian atmosphere. The study, published in Science, says the gas could have been generated by geochemical activity or possibly by living organisms. Planetary scientist Michael Mumma discusses the finding.

A study in the journal Proceedings of the National Academy of Sciences reports that hunting, fishing and plant gathering can speed up rates of species evolution, which may have negative effects on plant and animal populations. Study author Chris Darimont explains why.

Watch artists Michelle McSwain and Ryan Warnberg, collectively known as MRI, demonstrate how to paint with light. Vision expert Stephen Macknik, of the Barrow Neurological Institute, explains what the images teach us about the human visual system.