Every year，Time magazine puts out its list of the year's best inventions.Some of them help us solve problems，while others make life easier or more fun.Here are three of the inventions on this year's list.Which one do you think is the best？
Life﹣like animals
At the Hologram Zoo（全息动物园） in Australia，you don't just see a giraffe.You see a group of giraffes running towards you and then over you."We show people things they have never seen before，"says the zoo's CEO.Visitors to the zoo can see life-like wonders.Thanks to hologram technology，the public can see wildlife while no animals have to be kept in cages.
Stopping fires
Alert California is a safety program in California.It uses AI to predict wildfires.The AI detector（探测器） uses more than a thousand cameras in forests across the state.It can spot smoke and other early signs of fire.In two months，the program correctly predicted 77 fires before any 911 calls came in.
Air on Mars
If astronauts land on Mars in the future，they'll need air to breathe and a way to get home.NASA's Moxie can help solve both problems.This small equipment can separate oxygen（氧气） from the atmosphere（大气） on Mars and help astronauts breathe.In addition，the oxygen can be used to provide energy for spaceships.This is important for sending astronauts home from Mars.
