We often praise the world of science. It explains the world and makes our lives easier with technology. One of the most exciting fields in science is artificial intelligence (人工智能，AI). This is an area where scientists are working on creating machines that think like humans.

    However, one ofthe most famous scientists has a very dark warning for us about this type ofte chnology.

“The development of full artificial intelligence could lead to the end of the human race,” said Professor Stephen Hawking to the BBC.

    Hawking is a well-known British Physicist and writer of best selling science book A Brief History of Time. This warning came from a serious disease called ALS; he needs an AI computer to communicate. The computer learns how Hawking thinks and suggests the words he may want to use next.

    This is a basic type of AI, which is very useful, yet Hawking fears the possibility of creating technology that can match or go beyond human intelligence. And it's easy to imagine how terrible things may be. Many TV shows and films display big, killer machines that arefar cleverer than us. “Humans, who are limited by slow biological evolution(进化), couldn't compete, ” said Hawking.

But not every scientist is pessimistic(悲观的) about AI technology. “I believe we will remain in charge of（掌控) the technology. “ The potential(潜力) of itto solve many of the world problems will be realized.” In what direction do you think AI is going? Should we be hopeful or fearful?