Measles cases are on the rise in the US, with nearly 80 cases reported in January. The governor of Washington state says the measles outbreak there is an emergency.
The recent US government shutdown has had many serious effects. One interesting effect is that it allowed a group of elephant seals to take over a beach in a national park.
Thailand's capitol, Bangkok, is struggling to deal with dangerous air pollution. On Wednesday, the city closed over 400 schools for the week and is spraying water to try to clear the air.
Denmark has begun building a 43-mile (70-kilometer) fence along the border that separates it from Germany. The goal isn't to keep people out. It's to keep out a pig-like animal called a wild boar.
A huge blast of extremely cold weather has swept into the central and eastern United States from the North Pole, bringing dangerously low temperatures made worse by strong winds.
On January 1, over 50,000 books, poems, songs, and other works of art became "public domain" in the US, making them free for anyone to use.
Rising temperatures are warming the oceans and causing huge amounts of ice to melt faster than expected. Unless something changes, this melting will happen even faster in the future, causing large rises in sea level.
An undersea cable that connects the island nation of Tonga to the internet has broken. As a result, Tongans will be without their main internet connection for several weeks.
On Thursday, Félix Tshisekedi took over as president of Congo. Though many questioned the election results, most people seem happy that Congo's leadership has been passed peacefully for the first time in 60 years.