Welcome to the 12th episode of the stemng digest series where we bring to you some of the best posts under the #stemng tag in the past week.

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For those that do not know yet, stemng is a sub-community of steemSTEM, a community-driven project which seeks to promote well-written and informative Science, Technology, Engineering and Mathematics posts by Nigerians on Steemit. The project involves submitting quality STEM-related posts to the steemSTEM management for upvoting and resteeming where applicable.

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More information about stemng activities can be found [here](https://steemit.com/steemstem/@stemng/introducing-stemng-tag-a-sub-community-of-steemstem-for-nigerian-science-technology-engineering-and-mathematics-related-posts), while details of what it means to be part of steemSTEM can be found [here,](steemit.com/steemstem/@steemstem/being-a-member-of-the-steemstem-community) as well.

As we usually do, we have rummaged through the stemng tag and even though there were several good posts to choose from, below are the posts that stood out for week #12.

We started on Sunday so this week's episode will omit Saturday.

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### Sunday: [Corrosion: What are the costs? How do we minimize them?](https://steemit.com/stemng/@temitayo-pelumi/corrosion-what-are-the-costs-how-do-we-minimize-them)
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The week started with the post from @temitayo-pelumi on corrosion. A subject most of are well familiar with; we see it almost every day in action. The chemistry of it may be something we may not see every day but worth taking a look at the blog link above.




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### Monday: [What I Learnt Last Week 16: Spinal Cord Recovery, New Arsenic Test, Combination of Natural and Artificial Cells, New Use For Graphene, & A Weak Hand Grip](https://steemit.com/steemstem/@pearlumie/what-i-learnt-last-week-16-spinal-cord-recovery-new-arsenic-test-combination-of-natural-and-artificial-cells-new-use-for)
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The blog post of @pearlumie is packed full of exciting innovation from science. It started off with hope for patients with spinal cord injuries, a cheap arsenic detector to ensure water is safe to drink, ways to make the artificial cell and natural cell to work together, etc. For details, click the in the description.


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### Tuesday: [Track Traces the Apollo 11th on the Moon](https://steemit.com/science/@t4r1/track-traces-the-apollo-11th-on-the-moon-3fbcf0d83a76b)
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The @tr4r1 is here to further dispel any conspiracy theory of the Apollo 11 Moon Landing. The mapping satellite launched around 2009 has been able to map the Apollo 11 moon landing plus the footsteps of Armstrongs as he walks the moon was visible. For details of this chronicle, take some time to check the blog link.



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### Wednesday: [Psychology: Have Human Beings Outpaced Evolution](https://steemit.com/psychology/@saho/psychology-have-human-beings-outpaced-evolution)
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The psychology maestro, @saho, looks at the way humans development seems to have outpaced evolution. Within less than 300 years the human being had evolved so much regarding a lot of things such as knowledge, resource control, farming techniques, etc. The last few hundred years humans have created an environment which seems to be out of sync with the evolution of human species a million years ago.  


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### Thursday : [TEARDOWN OF A 2-STROKE ENGINE; MY ENGINEER'S STORY](https://steemit.com/steemstem/@rharphelle/teardown-of-a-2-stroke-engine-my-engineer-s-story)
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If you live in Nigeria, this two-stroke portable generator needs no introduction as it could be found in almost every home. It is the most economical electric petrol generator to help combat the near lack of power from the public electric utility. @rharphelle did a fantastic job in showing us the teardown of this generator. Not surprising, this generator is easy to fix, hence its popularity. Take a look at the disassembly process on his blog.


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### Friday: [HOW TO GET TO MARS 1: A Look At Elon Musk's Plan](https://steemit.com/steemstem/@sigmund/how-to-get-to-mars-1-a-look-at-elon-musk-s-plan)
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The last but not the least for this week's selection is the blog post by @sigmund. The article was on the ambitious project of Elon Musk plan to take people on a lunar trip to the Mars. I have the hope that one day I may make it to another planet. The dream appears feasible by the day with the likes of Elon Musk putting the idea to work. For more details do take a peep on the blog.


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### About the selection process
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The post for each day was selected based on consensus between the stemng management, in persons of @greenrun and @gentleshaid. This week's selections were made by @gentleshaid and presented by @greenrun.

Do not feel discouraged if your post did not make the list. There are rooms for improvement for everyone. Find time to read these guidelines if you wish to improve on your STEM-related writings.

Support for @stemng is welcomed in any form, including upvotes, resteems and steem power delegations. Feel free to interact with fellow stemians in our [discord server](https://discordapp.com/invite/KrWykYs).

All curation rewards earned will be used to fund the @stemng project.

Till next week!