China’s extensive surveillance of the Uyghur population does not stop at the Chinese border. In Sweden, Uyghur Nyrola Elima says her Twitter account is being tracked by the Chinese authorities back home as she campaigns for her cousin Mayila Yakufu to be released from the Xinjiang detention center. CNN’s Ivan Watson reports.
A new treatment could restore some mobility in people paralyzed by strokes 
What has Perseverance found in two years on Mars? 
This robot automatically tucks its limbs to squeeze through spaces 
Greta Thunberg’s new book urges the world to take climate action now 
Glassy eyes may help young crustaceans hide from predators in plain sight 
A chemical imbalance doesn’t explain depression. So what does?