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Old 2020-11-01, 15:19   #2828
kriesel
 
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Article posted just in time for Halloween:
the species once thought to be a biologist's hoax, when the first specimen was sent to Europe, with a duck bill, webbed feet, and fur, is a mammal that lays eggs, has venomous spurs, senses electrical fields to hunt, and GLOWS IN THE DARK for good measure (under UV lighting, e.g. has fur that fluoresces).
https://gizmodo.com/as-if-the-platyp...der-1845529134
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Old 2020-11-02, 13:43   #2829
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We wonder how creationists explain that!

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Old 2020-11-15, 17:33   #2830
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Cable failures endanger renowned Puerto Rico radio telescope
Quote:
SAN JUAN, Puerto Rico (AP) — Giant, aging cables that support one of the world's largest single-dish radio telescopes are slowly unraveling in this U.S. territory, pushing an observatory renowned for its key role in astronomical discoveries to the brink of collapse.

The Arecibo Observatory, which is tethered above a sinkhole in Puerto Rico's lush mountain region, boasts a 1,000-foot-wide (305-meter-wide) dish featured in the Jodie Foster film "Contact" and the James Bond movie "GoldenEye." The dish and a dome suspended above it have been used to track asteroids headed to Earth, conduct research that led to a Nobel Prize and helped scientists trying to determine if a planet is habitable.
<snip>
Last week, one of the telescope's main steel cables that was capable of sustaining 1,200 pounds (544 kilograms) snapped under only 624 pounds (283 kilograms). That failure further mangled the reflector dish after an auxiliary cable broke in August, tearing a 100-foot hole and damaging the dome above it.

Officials said they were surprised because they had evaluated the structure in August and believed it could handle the shift in weight based on previous inspections.
<snip>
Some new cables are scheduled to arrive next month, but officials said funding for repairs has not been worked out with federal agencies. Scientists warn that time is running out. Only a handful of cables now support the 900-ton platform.

"Each of the structure's remaining cables is now supporting more weight than before, increasing the likelihood of another cable failure, which would likely result in the collapse of the entire structure," the University of Central Florida, which manages the facility, said in a statement Friday.
<snip>
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Old 2020-11-15, 22:44   #2831
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Old 2020-11-17, 15:02   #2832
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Default Burning iron instead of carbon based fuels

Burning powdered iron produces only rust and heat as products so no CO2. Iron is abundant and rust is recovered easily since it is a solid. Currently, it only works in an industrial setting that requires a furnace. The Netherlands is leading the way on research and have installed a furnace at a brewery so they have beer being made by burning iron.

https://spectrum.ieee.org/energywise...e-co2free-fuel
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Old 2020-11-17, 17:32   #2833
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Quote:
Originally Posted by tServo View Post
Burning powdered iron produces only rust and heat as products so no CO2. Iron is abundant and rust is recovered easily since it is a solid. Currently, it only works in an industrial setting that requires a furnace. The Netherlands is leading the way on research and have installed a furnace at a brewery so they have beer being made by burning iron.

https://spectrum.ieee.org/energywise...e-co2free-fuel
How do you produce the iron which you then burn?
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Old 2020-11-17, 21:04   #2834
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Quote:
Originally Posted by xilman View Post
How do you produce the iron which you then burn?
I second. I was also wondering how pure the iron has to be.

Mining, smelting, and pulverizing iron seems a rather energy-intensive first step.

OTOH it might be possible to extract pure enough rust from red dirt cheaply (and which would already be in small particles), and de-oxidize it to produce iron, as described in the article.

The article acknowledges that using iron as fuel is an energy-losing proposition, but claims that the energy required for reprocessing could be obtained without fossil fuels.
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