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chihao chang
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Why are some people able to master a new skill quickly while others require extra time or practice? That was the question posed by UC Santa Barbara's Scott Grafton and colleagues at the University of Pennsylvania and Johns Hopkins University.
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Once upon a time, a friend of mine accidentally took over thousands of computers. He had found a vulnerability in a piec…
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So many children dream of fast cars and rocket ships, but few actually grow up to build them -- and change the world in the process
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chihao chang

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咖啡冷去、建築物倒塌、雞蛋破裂和星星黯淡消失,宇宙似乎在不可避免的走向熱平衡。天文學家、哲學家Arthur Eddington爵士在1927年就以能量的逐漸均衡作為時間之箭的不可逆轉的證據。然而,時間之箭看上去並沒有遵循基本的物理學法則。根據物理學法則,如果能知道宇宙所有粒子的路徑,我們可以將其逆轉,積累而不是分散能量,讓冷卻的咖啡逐漸升溫,讓建築物從廢墟中再次屹立,星星再次發光。現在,物理學家給出了一個時間起源的答案: 量子糾纏驅動了時間之箭 ,能量分散和達到均衡的過程中,基本粒子相互糾纏起來。咖啡冷去,因為咖啡的狀態與所在房間的狀態形成了糾纏,無法再走回頭路。MIT教授Seth Lloyd發現,在粒子與其它粒子建立起糾纏的過程中,單個的粒子失去了它們的個性,成為集體狀態的一部分,單個粒子不再包含任何資訊,集體包含了所有資訊。此時粒子抵達了均衡態停止變化,就像咖啡冷卻到室溫。
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With some straightforward logic, one theorist has shown that macroscopic quantum objects cannot exist if P≠NP, which sud…
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Larry Page稱寧願將財產留給Elon Musk也不願送給慈善機構
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This post originally appeared in Business Insider. Google CEO Larry Page has an unusual idea about what should happen to his billions should he die.  Instead of giving it to a philanthropic organization, he'd rather hand over his cash to Elon Musk, the founder of Tesla, SpaceX, and Solar City....
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天文學家用智利的甚大望遠鏡觀測到了黃色恆星家族已知的最大的恆星。這顆恆星比太陽大1300倍,編號為HR 5171 A,位於半人馬座,距離地球12000光年,它有一顆距離非常近的伴星。雙星系統的形狀類似一個巨大的花生(如圖所示)。它不是至今發現的最大恆星,至今發現的最大恆星UY Scuti比太陽大1700倍,但屬於紅色恆星家族。
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The whopper sun HR 5171 A would engulf all the planets between Mercury and Jupiter if placed at the centre of our solar system
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People
In their circles
22 people
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睡覺,尿尿,大便
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Introduction
my life is nothing, nothing at all...
everything is always so dreamlike to me...
but I cannot wake up... 
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extremely social failure