Drones (无人机) can do a lot of things for us, taking photos, delivering things from packages to pizzas to beer and following wild animals. But they have other uses now.
Can you believe it? Drones can serve people coffee. US company IBM has made this kind of drone. It can deliver coffee to sleepy people. The drone can know when to bring a cup of coffee by studying a person's data. Then, the drone will fly to the person. There is aspecial device (设备) under the drone. It helps the drone to give people coffee. The drone can also learn about someone's coffee—drinking habits and predict when someone needs their next cup of coffee.
Drones can also save lives. One company in Africa use drones to deliver medicine and blood fast and save many people's lives. The drones are able to fly at speeds of up to 60 mph and when they are within a minute of the destination (目的地)，the doctors receive a text and wait nearby. The drones drops off the package and then returns to its home.
A 92-year-old hunter in Virginia was lost and had to spend a night in the woods. The police searched for him all night but failed to find him. Luckily, the drone tracked him down in 20 minutes. Also, drones helped the firefighters know about the fire in the wildfire fight.
