When workers think they aren't being treated fairly, one way they can make their voices heard is by striking - refusing to work. Here's a look at four different groups of workers striking around the world.
Every year, butterfly lovers in California go out in November to count monarch butterflies. The 2018 count had a very worrying result - monarch numbers had dropped by 86% since 2017.
The last person to spot land iguanas on the Galapagos island of Santiago was Charles Darwin - in 1835. Now they're coming back. Experts believe it will be good for both the iguanas and the island.
Grocery stores are testing different ways of delivering orders using self-driving cars. Companies are experimenting more as self-driving cars get better and the pressure from online stores like Amazon gets stronger.
A water company in England has found a 210 foot (64 meter) "fatberg" blocking its pipes. The fatberg is a hardened mess of grease, oil, baby wipes, and other items. Removing it will take weeks.
In this article, NewsForKids.net looks at difficult political situations in three African nations, Gabon, Congo, and Madagascar.
Mina Guli has run 62 marathons - one a day since early November. She planned to run 100 to focus attention on the world's growing water problems, but now she's broken her leg and can't go on.
Dutch astronaut André Kuipers has reported that he once called the US emergency number 911 by accident while he was in the International Space Station.
Whales and tuna have been fished so much that, unless their numbers are allowed to grow again, there may one day be nothing left to hunt. Still, Japan keeps hunting these animals.
In September, a group called Ocean Cleanup towed a huge floating screen out to sea. The screen was meant to clean up plastic pollution. Now the device is broken and being towed to Hawaii.
The US government has been shut down since December 21 because President Trump and Congress don't agree about whether the US should spend money to build a wall between the US and Mexico.