From gene to see the evolution - from the fruit fly's compound eye to talk about evolution and development of

Eyes to the window of our soul is the perception of animals an important channel for the external environment, with a very important function. The evolution of eyes has been the evolution of an important controversy, opponents argue that it is hard to imagine such a complex organ sophisticated selection through the mechanism.Biologists to compare different animal eyes, analyze the pattern of development, optical structure, found to have many differences, so that in the course of evolution, many different animals have evolved independently in this visual organ eyes. Walter Gehring Switzerland in 1995 discovered a decision Drosophila compound eye development of master genes, and deduced the most eye development upstream regulatory mechanism may have evolved only once, that is to say all kinds of visual organs are derived from the same ancestors. The speech will be about the development of Drosophila compound eye to discuss the evolution of eyes.

We are at the center of the universe it? - The evolution of the human universe

Since ancient times, people constantly ask ourselves if we come from? Where to go?Whether we are God's voters, among the universe of life unique? Therefore, from the east to Western philosophers spent a lot of time to explore what is "the universe"? With this speech, we will explore how the world view of human evolution.Whether it is China's said that night declared that the period of ancient Greece or Nichido said that with the earth that our ancestors were trying to use the limited knowledge of the vastness of the universe to explain the process; modern science after budding, from the Columbia White Nepal to Galileo and Kepler, as well as Newton, Herschel, Albert Einstein, Harper and others efforts, let us also understand that people in the universe which the status of; and hoped that by this perception, so that the world can understand the relationship between man and nature.

Avenue of Stars Rings - from interstellar molecular cloud to the birth of stars

When we looked up the night sky (if lucky), you might see is a little bit of visible stars. Set up a telescope, deep look into the distance outside the galaxy, is visible Stars. Stars, can be said to be the universe's basic "particle." Where did they come from? What is the process of heat and light so that they eventually boarded the "Avenue of Stars"? The current understanding of stellar astronomers is diffuse in interstellar molecular clouds bred birth. A cloud due to the shelter, it is difficult to directly use the naked eye, or visible light observations to study the star formation process. Today, let us together with astronomers through the millimeter wave, sub-millimeter wave, and infrared band observation, spy buried in a cloud, the star of a variety of interesting phenomenon was born.

from single to multi-universe

Galileo four hundred years ago, mankind from the first time since the telescope point to the sky, on the continuous survival of our expanding universe of understanding. First of all, he observed from the telescope proved Copernicus's theory of the solar center, wrapped in the following four hundred years, scientists have first to understand the solar system in the Milky Way is just one of more than one hundred billion stars. Over the past hundred years, astronomers have further found that the universe, the Milky Way is only one of 10 billion galaxies. Over the past 20 years and we know that 95% of the universe called dark element of quality and a dark can , the nature of scientists are still unable to determine, what is even more surprising is that our universe may not be the only one, but a universe of hundreds of thousands. Follow the footsteps of Galileo along the way, we can not help but ask, mankind's position in the universe for that?