The LightSail 2 project has used a special "solar sail" to change the path of a small satellite going around the Earth. Bill Nye, the leader of the group behind the project, calls this "sailing on sunbeams."
Greta Thunberg, who started a worldwide movement to encourage action on the climate crisis, has announced that she will arrive for an important climate meeting in New York by sailboat.
The climate crisis is quite serious - scientists believe that humans have around 11 years to get global heating under control. Still, there is some good news that suggests that progress is being made.
Several teenagers are going home with millions of dollars in prize money after winning the first "World Cup" of the video game Fortnite. The contest shows how popular e-sports have become.
A massive heat wave swept across Europe last week, breaking historical records. The heat wave has now moved north, cooling off much of Europe, but bringing unusual heat and melting to northern areas.
In today's news roundup, India sends a mission to the moon, Hong Kong protesters take over part of the airport, an accidental joke is played on US President Trump, and an inventor falls into the English Channel.
In today's news roundup, Venezuela has another huge power outage, Puerto Rico's governor agrees to quit, an electric truck pulls a million-pound train, and the sender of a 50 year old message-in-a-bottle is found.
Japanese car rental companies have learned something interesting about their customers - many people in Japan don't rent cars to drive somewhere, they rent because they're looking for a quiet, private space.
Robert Mueller spoke to Congress yesterday. Many people expected excitement from the man who looked into whether US President Donald Trump and people working for him broke the law, but the meeting seems to have changed little.
Boris Johnson has been elected leader of the British Conservative Party. Mr. Johnson is expected to be named prime minister on Wednesday, leaving him in charge of managing the United Kingdom's exit from the European Union.