旅行时空

   观自在菩萨，行深般若波罗蜜多时，照见五蕴皆空，度一切苦厄。舍利子，色不异空，空不异色，色即是空，空即是色，受想行识，亦复如是。舍利子，是诸法空相，不生不灭，不垢不净，不增不减。是故空中无色，无受想行识，无眼耳鼻舌身意，无色声香味触法，无眼界，乃至无意识界，无无明，亦无无明尽，乃至无老死，亦无老死尽。无苦集灭道，无智亦无得，以无所得故。菩提萨陲，依般若波罗蜜多故，心无挂碍，无挂碍故，无有恐怖，远离颠倒梦想，究竟涅盘。三世诸佛，依般若波罗蜜多故，得阿耨多罗三藐三菩提。故知般若波罗蜜多是大神咒，是大明咒，是无上咒，是无等等咒，能除一切苦，真实不虚。故说般若波罗蜜多咒，即说咒曰：揭谛揭谛，波罗揭谛，波罗僧揭谛，菩提娑婆诃。

　　量子引力的新曙光

　　量子引力主要就是尝试将量子力学与广义相对论合并在一起，描述对重力场进行量子化，属于万有理论之一隅。但应该如何结合，又如何让二者在微观长度等级下维持正确性，以及任何候选的量子引力论又能提供什么样可证实的预测，这是当前的物理学悬而未决的问题。遗憾的是，量子引力所探讨的能量与尺度，乃是此前实验室条件下无法观测得到的，尽管可能，且可以透过天文观测来检验，但仍属少数特例，关于量子引力理论发展上的提示一直未能成功。

　　不久之前，美国劳伦斯伯克利实验室的弦论家霍扎瓦(P. Horava) 提出的一个新的量子引力模型在物理学界引起很大反应。这位最初让膜宇宙论思想在超弦理论中出现的物理学家、思想独到的捷克人，因为这次的

Shedding Light on Dark Gamma Ray Bursts

Gamma-ray bursts are the universe's biggest explosions, capable of producing so much light that ground-based telescopes easily detect it billions of light-years away. Yet, for more than a decade, astronomers have puzzled over the nature of so-called dark bursts, which produce gamma rays and X-rays but little or no visible light. They make up roughly half of the bursts detected by NASA's Swift satellite since its 2004 launch.

Using one of the world's largest optical telescopes, the Keck I in Hawaii, researchers looked for unknown galaxies at the locations of 14 Swift-discovered dark bursts.

In this image, dense knots of dust in oth

     Black hole of information is really lost it?

    Juan Maldacena’s work focuses on quantum gravity, string theory, and quantum field theory. He has recently proposed a relationship between quantum gravity and quantum field theories, which elucidates various aspects of both theories. His work relates apparently different problems such as quark confinement and black holes. This relationship has

 clarified various aspects of the physics of black holes. It has also provided new computational tools to tackle complicated problems in strongly interacting quantum field theories. Maldacena’s work provides a deeper understanding of the correspondence between string th