hilburn
hilburn t1_jdhxq48 wrote
Reply to comment by Banana-Oni in Potatoes are better than human blood for making space concrete bricks, scientists say by _GreenMartian
The idea was not to bleed astronauts dry, it was more "what can we do with human liquid waste?" so they were investigating urine, sweat, blood etc
hilburn t1_ist3dvy wrote
Reply to comment by CallMeLargeFather in How can we know details about animals that lived thousands of years ago if all we have are bones? by DemetrioGonz
Not normally, but they can do due to particular events - mudslides, floods, volcanic eruptions etc
hilburn t1_ist12nd wrote
Reply to comment by varialectio in How can we know details about animals that lived thousands of years ago if all we have are bones? by DemetrioGonz
Not to mention how they're found can give clues as to how they lived. Large groups together imply they lived in herds, smaller group with 2 adults and a number of juveniles is likely a family grouping etc
hilburn t1_irw7atx wrote
Reply to comment by skibble in The vast majority of the 150-400 billion stars in the Milky Way haven't been directly detected. Alpha Centauri is the nearest known star to Sol. What is the probability that there are nearer stars that remain undiscovered? by [deleted]
Proxima orbits AB with a period of ~550,000 years.
So the "sometimes" is a while, and includes for as long as we've been measuring things
hilburn t1_irvzah3 wrote
Reply to comment by Sylvaritius in New Zealand proposes taxing cow burps to reduce emissions by TDYDave2
No worries, there was also something I saw a while ago about seaweed also being good but I can't remember the details
hilburn t1_irvyh9o wrote
hilburn t1_irvwip8 wrote
Reply to comment by Sylvaritius in New Zealand proposes taxing cow burps to reduce emissions by TDYDave2
Different feedstock can change the carbon footprint of cattle significantly
hilburn t1_jditb0y wrote
Reply to comment by Ahelex in Potatoes are better than human blood for making space concrete bricks, scientists say by _GreenMartian
My memory of the original study was looking at it pretty watered down so you could get a reasonable-ish number of bricks per point, but also that it was a bit of a "well they made bricks with animal blood in the past, so let's see what kinda of properties they have" kind of study.
I guess in the event of an astronaut dying they could harvest the blood to make a porch or something though