文章列表

• 1.火星上的生命(1)
• Life on Mars Life Marker Chip Astronomers suspect that microscopic life exists on Mars, or maybe it did. The ExoMars mission funded by the European Sp...
• 2.在火星上，嗓门可得大一点！
• Sound dies quickly in the cold， thin air of Mars. Researchers have modeled a sound wave traveling through the Martian atmosphere and report that it d...
• 3.黑洞的能量效率惊人
• Astronomers have discovered that， deep inside the biggest and brightest galaxies in the universe， jets are spewing particles from around black holes...
• 4.月球起源的再思考
• THE ONE GREAT QUESTION left unanswered by the manned landings of the Apollo project in the1960s was the moon' s origin. Now a growing consensus among ...
• 5.Why Sea Sometimes Rise and Sometimes Fall
• The rising and falling of the sea is known as rising tide and ebb tide. Why does the tide rise? Actually, it is the sun and the moon that are pulling ...
• 6.Why Is There a White Circle Around the Moon
• Very， very high up in the sky there sometimes flows a stream of warm air. When it meets the cold air from the lower level， the cold and warm air mix...
• 7.Where Water in Rivers and Lakes Comes from
• Water always flows from a higher place to a lower place rivers and lakes are deep valleys on the earth. The snow water and spring rain water from the ...
• 8.What Is It Like at the Bottom of the Sea？
• When the sea appears on TV or in the movies， it always look endless. But do you know what it is like at the bottom of the sea？ The seafloor along th...
• 9.Why Sun Bigger at Sunrise/Sunset Than Noon
• When the sun rises from the east in the morning and falls down in the west at dusk， it looks very round and big. But at noontime it looks small and t...
• 10.Where Sun and Moon Goes When It Rains
• As we already know， rain is drops of water from the cloud. If there is no cloud， there won't be rain. When it rains， clouds are generally very thic...