Scientists often compare coral reefs(珊瑚礁) to underwater rainforests, yet unlike the leafy plant base of a forest, corals are animals. The soft creatures are naturally half-transparent and get their brilliant color from algae(藻类) living inside them. When corals experience stress from hot temperatures or pollution, they halt the interdependent relationship with algae, typically pushing them out and turning white. Corals are still alive when they are white, but they're at risk and many eventually die, turning dark brown.

Scientists around the world are looking for means to protect and maybe increase corals. One common option is to create more protected areas — essentially national parks in the ocean. Beyond nature preserves, some conservationists are looking to more hands-on methods. One research center in the Florida Keys is exploring a form of natural selection to keep corals remaining. The reef system in the Keys has been hit hard by climate change and pollution, which is especially tough, because corals there help support fisheries worth $ 100 million every year.

To keep the wild ecosystem alive, Erinn Muller, the center's director, and her team are harvesting samples of the corals that survived the environmental stress naturally, keeping them to make them reproduce, and then reattaching them to the reef. They have 46,000 corals on plastic frames under the sea. So far, the center has regrown over 70,000 corals from five different species on damaged reefs.

In The Bahamas, Ross Cunning, a research biologist at Chicago's Shedd Aquarium, focuses on corals with genes that could make them natural candidates for restoration projects. He published a study of two Bahamian reefs, one that survived an extreme 2015 heat wave, and one that didn't. "We think their ability to deal with these higher temperatures is built into their genes," says Cunning. There's evidence of corals evolving more quickly to resist rapidly warming climate. The big question scientists need investigate, adds Gunning, is how much more heat corals can adapt to.

People say that a dog is man’s best friend. Once dogs find their “people”,   they will stay by their side until the very end. Sadly, however, many families lost or even gave up their dogs.

Leo is a dog from Thailand. He became popular on the Internet because of his amazing story. About four years ago; the poor dog was left behind by his owners somewhere near a gas station. Hoping his owners would return for him, the dog never left his spot(地点).

Luckily. Leo was never truly alone. Seeing the poor thing, people there decided to help him out. Saowalak, a 45-year-old woman, took the poor dog back to her home after giving him food. However, Leo just kept on running away only to return to his old spot and wait for someone by the side of the road.

In the end, she let him but still brought over some food every day so that Leo wouldn’t be hungry.

Another person, Anuchit, also cared about Leo and decided to put some photos of the dog online to find his family. That’s when the Internet did its magic. After being put on the Internet, the photos finally reached Leo’s missing family. They called Anuchit, telling him how the dog in the pictures looked like their dog.

It turned out that Leo was their dog. They lost him back in 2015. They looked for him for a week but had little hope of finding him. They thought that they would never see him again.

The family and Leo got the chance to see each other again. But while both seemed happy to be reunited(重逢), it also seemed like something has changed with Leo. When the family asked Leo to get into the car and go home with them, Leo stopped. …

An amateur fossil hunter has unearthed a new type of prehistoric “sea dragon” on the beach of the UK's Dorset Coast. The new 2m-long ichthyosaur is named “Etches sea dragon”,after fossil collector Dr. Steve Etches, who found it buried head-first. Ichthyosaurs are called sea dragons for their usually very large teeth and eyes. He thought its teeth were unusual,so he passed it on to experts at the University of Portsmouth to identify(鉴定).There,a Masters student, Megan Jacobs, who has spent several years working on ichthyosaurs, identified it as a new species, which lived 150 million years ago.

The find is the UK's fifth known ichthyosaur from the Late Jurassic periods,and by far the smallest so far.

The fossil was found near Kimmeridge Bay—part of the Jurassic Coast World Heritage Site. When it died, the seafloor would have been very soft mud, allowing the front half of the animal to sink into the mud, before other animals came along and ate the tail end.Being buried in a bed of soft mud meant it was preserved in exceptional condition and even some of its soft tissues were preserved.

Megan said, “Fossils of Late Jurassic ichthyosaurs in the UK are extremely rare. I did some research,comparing it with those known from other Late Jurassic fossils found around the world. It was very exciting that I didn’t find a match. Steve's extraordinary collection contains many new and exciting animals, and it was a real honor to have the chance to describe this ichthyosaur.”

Professor David Martill,who leads the palaeontology(古生物学)research,said, “Steve is an exceptional fossil collector and although he is sometimes referred to as an amateur collector, he has done so much for palaeontology that he has been awarded an MBE, Member of the British Empire, and is truly a professional.”He added, ^“If it were not for collectors like Steve,scientists would have very few specimens(样本)to work on. ’’