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In every galaxy scientists looked at, they found evidence for a supermassive black hole. NGC 3115 NGC 3377 NGC 3379 In M31 and M32 In total there is probably 20-30 or so black holes that have been fou
超大质量黑洞
[00:00.52] 12.18 Holes in His Mind [00:06.29]Major James Nesmeth had a dream of improving his golf game and he developed a unique method of achieving his goal. [00:14.35]Until he devised this method, he was just your average weekend golfer, shooting
温馨夜读II
once upon a time a country mouse invited his cousin，a townmouse，to stay with him for a few days．The country mouse lived alone under a hedge in the corner of afield．His straw－lined home was dry and warm and he lived there simply and safely f
趣味英语
Once there were two mice. They were friends. One mouse lived in the country; the other mouse lived in the city. After many years the Country mouse saw the City mouse; he said, Do come and see me at my house in the country. So the City mouse went. The
趣味英语
New Data Adds to Understanding of 'Black Holes' WASHINGTON Scientists continue to learn more about black holes in space, places where the pull of gravity is so strong that not even light can escape. Black holes occur after supergiant stars explode in
VOA标准英语2016年(九月)
A mother mouse was out for a stroll with her babies when she spotted a cat crouched behind a bush. She watched the cat, and the cat watched the mice. Mother mouse barked fiercely, Woof, woof, woof! The cat was so terrified that it ran for it's life.
趣味英语