Long ago, the world had no wheels. To go to places, people walked. Sometimes, they had to take
Later, people thought about animals, which could
Gradually people begin to put wheels into many
相似题推荐
The computer began as a
At the beginning, the computer was
In the early 1960s, computers could be connected by a network,
Researchers have long expected to use tiny flying robots to do important tasks. However, fitting the heavy electronics required to power and control the wings into the tiny robots has been
Of course, we draw lessons from the test: The robot has no navigation capabilities and, more
The Harvard researchers are not the only scientists trying to create flying robots. Other researchers also hope to experiment with other power sources and to add more advanced "brains" and sensor systems that will enable future flying robots
As a young child, Ann Makosinski would spend hours experimenting with her toys and other everyday objects around her to create her own inventions.
Now a first-year Arts student, Makosinski is a well-known inventor and entrepreneur(创业者).
She won the 2015 Sustainable Entrepreneurship Award of Excellence,
At the age of 15, Makosinski created a prototype(原型)for a flashlight
“I’m half-Filipino and half-Polish, and one of my friends from the Philippines told me that she failed school
The Hollow Flashlight is made from Peltier tiles(珀耳贴贴片)that produce energy when one side
Her advice to other student innovators?“Start now. There
With a history of more than 2,000 years, the Silk Route dates back to Han dynasty. Through this route, the Chinese highly
That route functioned
Throughout all these years, many great figures have made great
Sanfu medicinal patch, is a bandage made of traditional Chinese herbal medicine. Practitioners of traditional Chinese medicine(TCM)believe that receiving Sanfutie during the
These patches have been used in TCM
Each morning, amateur
The over-2,000-year-old canal that Cui
Along the canal’s 75-km section