科普+收藏：YouTube上很好的一个科普频道——Lesics
Posted inSTEAM 人工智能 创客 建模 技术 收藏 教程 数学 极客地带 物理学 物联网 电脑技术 知识 硬件 科技发明 科教片 科普 视频

科普+收藏：YouTube上很好的一个科普频道——Lesics

Posted inSTEAM, 人工智能, 创客, 建模, 技术, 收藏, 教程, 数学, 极客地带, 物理学, 物联网, 电脑技术, 知识, 硬件, 科技发明, 科教片, 科普, 视频
Lesics - YouTube 讲解了一系列工程中背后的物理学原理，让人大开眼…
Posted in物理学 理论物理 科普 量子引力

物理学：Does Time Really Flow? New Clues Come From a Century-Old Approach to Math.

Posted in物理学, 理论物理, 科普, 量子引力
本文转载自：

Does Time Really Flow? New Clues Come From a Century-Old Approach to Math.

By Natalie Wolchover

April 7, 2020

The laws of physics imply that the passage of time is an illusion. To avoid this conclusion, we might have to rethink the reality of infinitely precise numbers.

If numbers cannot have infinite strings of digits, then the future can never be perfectly preordained.

Dave Whyte for Quanta Magazine

Strangely, although we feel as if we sweep through time on the knife-edge between the fixed past and the open future, that edge — the present — appears nowhere in the existing laws of physics.