Truck drivers and police were seen clashing in Dover, England as frustrated drivers try to cross into mainland Europe after being stranded for days. France agreed to reopen some travel from the UK after closing the border due to a variant of Covid-19. The agreement requires that anyone traveling from the UK into France show proof of a negative coronavirus test taken within the previous 72 hours. CNN’s Salma Abdelaziz 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?