In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: Astronomers say they are on the point of finding planets like Earth orbiting other stars, which is a key step in determining if we are alone in the universe. A top NASA official and other leading scientists say that within four or five years they should discover the first Earth-like planet where life could develop, or may have already. A planet close to the size of Earth could even be found sometime this year. At the annual American Astronomical Society conference this week, each discovery involving so-called "exoplanets" --those outside our solar system -- pointed to the same conclusion:Quiet planets like Earth where life could develop probably are plentiful. NASA's Dew Kepler telescope and a lot of new research from the suddenly hot and competitive exoplanet field caused noticeable buzz at the meeting.Scientists are talking about being at "an incredible special place in history" and closer to answering the question. "Are we alone? For the first time, there's an optimism that sometime in our lifetimes we're going to _ that," said Simon Worden,an astronomer who heads NASA's Ames Research Center. "If I were a betting man, which I am, I would bet we're not alone." "These are big questions that reflect upon the meaning of the human race in the universe," the director of the Vatican Observatory, the Rev. Jose Funes, said Wednesday in an interview at this week's conference. Worden told The Associated Press: "I would certainly expect in the next four or five years we'd have an Earth-sized planet in the habitable zone."
Answer: Finding an Earth-like planet

A: What is very important in determining if we are alone in the universe?
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Q: Article: Researchers who helped discover a new species of Mexican butterfly are offering to sell the naming rights to raise money to fund more research. Co-discoverer Andrew Warren is hoping to raise at least $50,000 by auctioning off the rights to name the 4-inch "owl eye" butterfly, which lives in Sonora, a Mexican state bordering Arizona. "That would support at least two years of research for our team down in Mexico," Warren said. "Money goes a long way down here in Mexico." According to the scientific tradition, discoverers of a new species have the say in naming it. In recent years, some discoverers have auctioned off their naming rights to raise money. Warren said the amount being sought for the butterfly is not out of the question, noting that naming rights for a new monkey species brought in $650,000 two years ago. A group of 10 new fish species that went on the naming auction block at the same time earlier this year brought in a total of $2 million. The butterfly discovered by Warren and researcher George Austin ranges as far north as Mexico. The butterfly was actually in a collection, misidentified as an example of another new species, at the McGuire Center for Lepidoptera and Biodiversity at the Florida Museum of National History in Gainesville, said Warren. They soon began the hard process of determining that it was indeed a "new" model of butterfly. After checking photos and comparing it with other known species, they determined it was a separate species.
Answer: Near the US-Mexico border.

A: Where did the researchers discover the new species of butterflies?
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Q: Article: It was a hot afternoon. I had a quarrel with the airport staff and then was asked to have a drug test .I missed the flight home later because of bad weather. Now my flight home was full and running late. I felt sorry and unlucky. At that moment,I noticed a 5-year-old boy standing by his mother watching me. He left his mother and slowly walked towards me."Great!"I thought sadly,"Now I have to take care of a 5-year-old child. My day is now complete." As he came closer,I found it was my hat that he was after. I wanted to tell him not to touch my things,but I was curious to know what he would do with my hat. With wide eyes,he gently touched my hat. He looked up at me,smiling,but saying nothing. I asked him if he wanted to wear my hat,he excitedly nodded,still smiling. I placed my hat on his head,but it fell down around his ears. He didn't mind and held it up with both hands. He ran to show his mother,then back to me,still smiling. With much respect,he slowly took off my hat with both hands and gave it to me. I put my hat on and gave him an airplane card. Holding the card carefully with both hands,he looked up at me and said,"Mister,you sure are lucky.""Yes,I sure am,"I said. I admired the wisdom of a 5-year-old boy,as I got the last seat on that flight home.
Answer: Unhappy.

A:
What did the writer feel when he watched the boy walking towards him?
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