Anaconda Python needs cleaning every once in a while


As a user of Anaconda python I have been receiving (Ubuntu) system warnings of low free space in my home directory. Investigating what was causing this I found out that Anaconda python had several versions of each package. The overall size of the pkgs directory was 14+ GB. After cleaning it is about 3GB.

The second largest directory was my mail in Thunderbird.

So it would be wise, especially if you are limited in disk space, to clean Anaconda. The commands I used are as follows:

conda clean --all
conda update conda
# just to make sure nothing is broken and
# your environment is updated
source activate <your-environment>
conda update --all
conda clean --all

Insight, a mission to explore Mars’ Interior


So far the only way to get any information about the interior of rocky planets was from the moment of inertia which is related to a planets mass distribution. This only allowed to estimate if a planet has a mantle and what the estimated thicknesses of the core and mantle are. Of course, other (remote sensing) methods like potential (gravity and magnetic) fields can also give more information about a planets interior. However, the only solid way to determine the layer interface and their depth and thicknesses is seismic imaging, a popular technique used to image Earth’s subsurface and interior.

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Snow in the Desert


source: NASA Earth Observatory

via [NASA Earth Observatory]

A Close-up Look at a Rare Underwater Eruption


via: Woods Hole scientists took close look at largest underwater volcanic eruption in 100 years

We’re building a dystopia just to make people click on ads, Zeynep Tufekci [TED talk]


Experiments show that what the algorithm picks to show you can affect your emotions. But that’s not all. It also affects political behavior.

The Bash Hackers Wiki [link]


The Bash Hackers Wiki

This wiki is intended to hold documentation of any kind about GNU Bash. The main motivation was to provide human-readable documentation and information so users aren’t forced to read every bit of the Bash manpage – which can be difficult to understand. However, the docs here are not meant as a newbie tutorial.

Sperms Destroy Cancer Cells by Chemical Injection


A study recently published by Haifeng et al. demonstrated the use of sperms guided by a magnetic source (so called spermbots) to deliver chemical injections to cervical cancer cells. A video of this demonstrations (see below) has been published by New Scientist.

via: New Scientist