The discovery of a dwarfed (矮個(gè)的)”human being” who lived in Flores .Indonesia, up to 18,000 years ago is changing the way we think about the human family .This “Flores Human” was three foot tall and her brain was smaller than that of the average chimp (黑猩猩),yet she and her relatives apparently lived fully human lives. They seem to have made tools ,worked together to find food and cook it, and perhaps even buried their dead with ceremony.
It was a major surprise to find tools associated with the new human family member .The tools are like those formerly seen only with European fossils (化石)from our own species; Homo sapiens (智人);and the oldest of them were made 94,000 years ago .Homo sapiens is thought to have arrived in the island about 40,000 years ago ,much too late to be responsible for the tools .If this tiny human made the tools ,them the inside structure (結(jié)構(gòu))of its brain must have been more like our own than a chimp’s ,despite being just a third the size of ours.
This “new human” was suspected to be a dwarfed branch of Homo erectus (直立人).When creatures are separated in regions with rare resources but few enemies, being big is a disadvantage, and evolution tends to shrink them, a process known as island dwarfing. Could natural selection make a human smaller while keeping — even improving — mental ability ?Quite possibly, believes Christopher Wills of the University of California.
Has the “Flores Human” even shown the ability of language? “I find it difficult to imagine that people could make tools,use fire ,and kill large animals without fairly advanced communication.” Wills says .Did “Flores Human” possess the basic components of human culture — such as the burying of the dead with ceremony? Emiliano Bruner of the Italian Institute points out that Indonesia’s hot, wet environment is bad for fossilization. It is reasonable to assume, he says, that the 18,000-year-old bones of the most complete Flores woman were well-preserved because she was buried with special care.
1. According to the passage, “Flores Human”______.
A. lived a partly human life
B. was a branch of Homo sapiens
C. used tools before Homo sapiens arrived
D. had a brain as a common chimp’s
2. The underlined part “this tiny human” in Paragraph 2 refers to _______.
A. a chimp B. Flores Human
C. Homo sapiens D. Homo erectus
3. This passage mainly talks about______.
A. the tools made by “Flores Human”
B. the language used by “Flores Human”
C. the evolution of “Flores Human”
D. the major surprising findings about “Flores Human”
4. According to the passage, it is believed that “Flores Human”_______.
A. was dwarfed by its enemies
B. could use language
C. left a lot of fossils in hot and wet environment
D. reached Flores 40,000 years ago
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The ________(discover)of oil on their land made the family rich.
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Life on Mars could become a reality and it could happen in your lifetime.
A welcoming planet
Scientists say Earth’s neighbor Mars, a bright red planet about half Earth’s size, is the most likely to support human life. Mars even has frozen water on its surface.
Since the late 1990s, NASA has been exploring Mars using remote-controlled vehicles(裝置). Most recently Curiosity, a car-size vehicle, traveled through space on an unpiloted spacecraft(航天器) and landed on Mars in August 2012. Directed by NASA scientists , the vehicles move on the surface, taking pictures , collecting and analyzing soil, and looking for signs of life.
But what about human explorers? Plans are already in the works to send astronauts to Mars as soon as the mid-2030s.
_____________________________________
But before you start packing your bags, let’s consider the challenges. For starters, Mars is far away. Just getting there could take up to 10 months.
Scientists already know that time away from Earth’s gravity harms the human body. Bones and muscles get weaker. The body produces less blood. What damage would months and months of living in space do?
And then there is the matter of water, oxygen, food and fuel. Scientists will have to find solutions to these problems, or the first humans on Mars won’t survive very long in their new home.
Tiny Dangers
There’s another tinier risk. It’s so tiny that you can’t even see it: germs.
Some scientists believe that our germs could pollute the whole planet of Mars. Potentially killing Martian life before we have the chance to discover it. Worse, there is a small but terrifying chance that any microscopic life already there might be harmful to us .
Worse still, if any of those Martian germs(火星細(xì)菌) were brought back to Earth, the result could be disastrous. Animals, plants, and people could be wiped out.
Worth the $$$?
A more practical concern is the cost. The price could approach $ 1 trillion(萬億). How can we justify spending that much when so many problems—poverty, disease—could use the cash here on Earth?
1.Which of the following is TRUE according to the “A welcoming planet” part?
A. Mars is a little bigger than Earth.
B. There are flowing rivers on Mars.
C. People haven’t been to Mars so far.
D. Scientists have discovered signs of life on Mars.
2.Which of the following can best fill in the blank in the passage?
A. Living in space. B. Limited resources.
C. Extreme conditions. D. Interesting challenges.
3.By “Tiny dangers” the author means ________________.
A. there is no serious danger
B. people won’t be in any danger
C. it’s difficult for people to realize the danger
D. the danger may be caused by very small things
4.Which may cause the biggest danger?
A. Martian germs may be different from those on Earth.
B. Martian germs may be brought back to Earth.
C. People may carry germs to Mars.
D. There may be germs on Mars.
5.Which section of a newspaper is the passage most probably taken from?
A. People B. History C. Science D. Business
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