EchoSTEM

Sunday, June 6, 2021

Project Hail Mary by Andy Weir

'Project Hail Mary' by Andy Weir, published in May 2021, is a must read if you liked 'The Martian.' This book is quickly becoming one of my favorite scifi books of all time. More epic than the Martian; more engineering and more science than what you have read in his first book.

Physics, chemistry, microbiology, mechanical engineering, computer science, scientific inquiry and experimentation, teamwork and humanity at its best. 

You will try to read this book as fast as possible; you will be engrossed in Ryland Grace's adventure. By the way, I think Weir did science the shit out of this one.


Related Links:

  • The Martian
  • Artemis

Posted by Cem at 9:25 PM No comments:
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Wednesday, October 21, 2020

Osirix-Rex Asteroid Sample Return Mission

OSIRIS-REx tags Bennu! Watch the moment of impact:

 

[from https://www.asteroidmission.org/]

What's up with that name, you ask? Here is an explanation:


Links:

  • Mission objectives

Posted by Cem at 8:54 PM No comments:
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Labels: asteroids, space exploration

Sunday, May 5, 2019

Drake Equation: A visualization

A very nice visualization and interactive calculator for Drake Equation is at https://informationisbeautiful.net/visualizations/the-drake-equation/ 
 
https://informationisbeautiful.net/visualizations/the-drake-equation/

Make sure you select 'lowest possible' and look at the final number ;)
Posted by Cem at 9:28 PM No comments:
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Labels: aliens, galaxy, math, space

Monday, November 19, 2018

A new branch? A new branch of tree of life?! (aka Hemimastigophora is a novel supra-kingdom-level lineage)

This is a good story.. Or, a news event? This is a good science news.

So, there is this young student, Yana Eglit, a Ph.D. student at Simpson Lab, Dalhousie University, in Hallifax, Canada. She goes on a picnic/hike with friends, and picks up some random dirt samples:

"The hemimastigotes [...] were found by Eglit during a spring hike with some other students along the Bluff Wilderness Trail outside Halifax a couple of years ago. She often has empty sample vials in her pockets or bags, and scooped a few tablespoons of dirt into one of them from the side of the trail."

This is the best part of the story, maybe besides their final observations; Ms. Eglit takes empty sample vials with her when she goes hiking!

She then "back at the lab,  soaked the soil in water, which often revives microbes that have gone dormant, waiting for the next big rainstorm. Over the next few weeks, she checked on the dish through a microscope to see what might be swimming around." This was few years later, and is the second best part of the story, besides the fact that they have discovered a new branch of life; she pulled the samples years later to take a look.

When she observed some strange behavior. "It's as if these cells never really learned that they have many flagella," Eglit said with a laugh. She had seen something with that strange motion once before, a few years ago, and recognized it as a rare hemimastigote." This is the third best thing about this story; she was building on previous scientific research/knowledge.

Then, "realizing that she had something very rare and special, Eglit flagged another graduate student Gordon Lax, who specializes in genetic analyses of individual microbes — a new and tricky technique — to see where they fit in the evolutionary tree. The pair dropped everything to analyze the new microbe." And, the fourth best thing about this news; she quickly find another researcher to help her and they collaborated. This is the advantage of having a scientific laboratory (and scientific community) where scientists can work together.

And, then they realized that they have identified a new species that do not belong to known branches of the tree of life. The final manuscript involves 6 researchers and three different labs.

Science (and scientific methods) works!

Read the details here. And, make sure you listen to the audio at the end of the article where Biology professor Alastair Simpson and Mainstreet host Bob Murphy discuss this news in detail.

Related articles:
  • Globe and mail
  • Gizmodo

Related Links:
  • Simpson Lab
  • Manuscript at Nature: Hemimastigophora is a novel supra-kingdom-level lineage of eukaryotes, Gordon Lax, Yana Eglit, Laura Eme, Erin M. Bertrand, Andrew J. Roger & Alastair G. B. Simpson 


Posted by Cem at 8:30 AM No comments:
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Labels: biology, Dalhousie University, hemimastigote, microbes, science, tree of life

Sunday, November 18, 2018

Old kilogram, meet new kilogram

Kilogram (kg), the base unit of mass in SI (system international; international system of units) is defined with a platinum alloy cylinder, located near Paris. The cylinder was manufactured in 1889.
After 130 years, on May 20th, 2019, the reference definition of kilogram will no longer be this physical artifact, but a physical constant.

Planck constant, defined exactly as:

6.62607015×10−34 kg⋅m2⋅s−1 

can define the kilogram in terms of second and meter [Wikipedia], assuming we can determine Planck constant by a stable measurement. Meter is (now) defined as a time fraction of speed of light in vacuum. Therefore, kilogram can now be defined in terms of time only.

Here are the devices for the old and new definition of the kg:

 (J.L.Lee/NIST)

  (J.L.Lee/NIST)

Related articles:
  • Kilogram Redefined (Wired)
Related Links:
  • Kilogram (Wikipedia)
  • Planck constant (W)
  • Meter (W)
  • International System of Units (W)
Posted by Cem at 7:23 PM No comments:
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Labels: kilogram, planck constant, SI units

Wednesday, October 10, 2018

Exoplanets... to date

Don't forget to visit this page on Wikipedia for the list of exoplanets discovered so far once in a while. The list is increasing.


Posted by Cem at 5:48 AM No comments:
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Labels: astronomy, exoplanets, wikipedia

Tuesday, October 9, 2018

New species: "Coywolf"

RawStory reported, in 2015, that there is a new species combining wolves, coyotes and dogs is evolving as you read this article.

Related:
  • Greater than the sum of its parts, Economist, Oct 31, 2015.
Posted by Cem at 7:36 AM No comments:
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Labels: biology, coyote, eastern US, evolution, wolf
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