## 物理：狭义相对论中的质量增大是质量真的变大了吗？为什么不能超光速？

$m=\frac{m_0}{\sqrt{1-v^2/c^2}}$

$m=\frac{1}{\sqrt{1-v^2/c^2}}m_0=\gamma m_0$

## 物理学：Leidenfrost Phenomenon与Random Walk

Leidenfrost Phenomenon 翻译成 “莱顿弗罗斯特现象”，是指液体不会润湿炙热的表面，而仅仅在其上形成一个蒸气层的现象，由科学家莱顿弗罗斯特在1756年发现。

When Water Flows Uphill

The Inverse Leidenfrost Effect

The WALKING WATER Mystery (in SPACE and SLOW MOTION!) – Smarter Every Day 160

## Candidate theories

There are a number of proposed quantum gravity theories.[33] Currently, there is still no complete and consistent quantum theory of gravity, and the candidate models still need to overcome major formal and conceptual problems. They also face the common problem that, as yet, there is no way to put quantum gravity predictions to experimental tests, although there is hope for this to change as future data from cosmological observations and particle physics experiments becomes available.[34][35]

There are a number of other approaches to quantum gravity. The approaches differ depending on which features of general relativity and quantum theory are accepted unchanged, and which features are modified.[51][52] Examples include: