Since its 2018 launch, NASA's Parker Solar Probe (record-holder for closest-ever spacecraft to the Sun) has finished three of 24 planned passes through never-before-explored parts of the Sun's atmosphere. Four new articles describe what scientists have learned…

How did the almost 6,000 languages of the world come into being? Researchers have tried to simulate the process of developing a new communication system in an experiment -- with surprising results: even preschool children can spontaneously develop communicatio…