Scientists study campers in the cave. HUMAN ADAPTATION INSTITUTEScientists study campers in the cave. HUMAN ADAPTATION INSTITUTEWhat does it feel like to spend 40 days in a cave without a phone ……

, they found an amazing place there. It was a cave (山洞) full of huge white crystals (水晶)! Where is the cave?This cave is in Mexico (墨西哥). It is about 300 meters under the ground. It is part of the Naica ……

TUCHONGTUCHONGWe can find caves (洞穴) underground. But we can find caves underwater too. Hranicka Propast is the world’s deepest underwater cave.The cave is in the Czech Republic (捷克 ……

The campers were studied by scientists when they were in the cave.  HUMAN ADAPTATION INSTITUTEThe campers were studied by scientists when they were in the cave.  HUMAN ADAPTATION INSTITUTE ……

job!Whenever I'm not going to school, I work as a tour guide at a place called Crystal Cave (洞穴.... They are warm-hearted and always have smiles on their faces.One tour at Crystal Cave is called ……

Help Crystal the cat reach the library! ……

I love my job.Whenever I’m not going to school, I work as a 3 at a place called Crystal Cave... at Crystal Cave is called the Adventure Tour. We climbed through holes for two hours, and when we were ……

in a boat on an underground river in a cave. Remember to close your eyes. After the boat makes its... the sound of the water. It travelsdeep(深地) into the cave. In the darkness, you canreach out(伸出 ……

, they found an amazing place there. It was a cave (山洞) full of huge white crystals (水晶)!Where is the cave?This cave is in Mexico (墨西哥). It is about 300 meters under the ground. It is part of the Naica Mine ……

. Some steps went underground."This is really scary (吓人的)," Josh said quietly. He could hear water.They kept walking. Suddenly, Dink stopped. In front of him, he saw a cave."We must be in the secret ……

. It provides (提供) an underground cave!The room brings people back to older times. There’re no Wi-Fi... that it will help these people get away from the election season. It provides (提供) an underground cave ……

cave is unique inside, according to HowStuffWorks website. Some are just dark, rocky holes, while... important thing. It’s easy to get cut inside a cave.Caving is not very competitive, so there aren ……

Help Crystal the cat find a way out. ……

bitten by animals inside of a cave. There’s no cellphone signal (信号) underground, so knowing... signal (信号) underground, so knowing first aid (急救) is very important.   Meet a cave ……

, or even get bitten by animals inside of a cave. There’s no cellphone signal (信号) underground, so... might find?Every cave is different inside. Some are just dark, rocky holes. Others are huge halls ……