Category Archives: Science

Mission Control

The Guardian: Apollo 13: celebrating the unsung heroes of mission control. “Ahead of a new documentary about Nasa’s ground crews, astronaut Jim Lovell talks about the team that saved his life during 1970’s ill-fated moon mission”.

“It is unlikely there is anyone who has more appreciation for the work of Nasa’s mission control than Captain Jim Lovell. His Apollo 13 mission was nearly destroyed when an oxygen tank in its main command module exploded. His spaceship was crippled and only narrowly coaxed to a safe return to Earth thanks to his crew’s heroic efforts – and the crucial aid of mission control.

Lovell was commander of Apollo 13 but was forced to abandon his mission’s planned lunar landing when the blast, which occurred 200,000 miles from Earth and two days into its journey in April 1970, triggered a major loss of power. Cabin heating stopped working, the water supply was disrupted and carbon dioxide began to build up. Lovell and crewmen Jack Swigert and Fred Haise were facing death.”

The movie is available here on demand.

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Tiny but dangerous

The Guardian: Single clothes wash may release 700,000 microplastic fibres, study finds. (September 27, 2016) “Tiny plastic particles released by synthetic fabrics can cause harm to marine life when they enter rivers and oceans.”

“Each cycle of a washing machine could release more than 700,000 microscopic plastic fibres into the environment, according to a study.
Inside the lonely fight against the biggest environmental problem you’ve never heard of
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A team at Plymouth University in the UK spent 12 months analysing what happened when a number of synthetic materials were washed at different temperatures in domestic washing machines, using different combinations of detergents, to quantify the microfibres shed.

They found that acrylic was the worst offender, releasing nearly 730,000 tiny synthetic particles per wash, five times more than polyester-cotton blend fabric, and nearly 1.5 times as many as polyester.”

So far, there doesn’t seem to be a whole lot we consumers can do, except not wear synthetic clothing. However, there’s a company called Guppyfriend that is developing a washing bag designed to catch those microfibers. Here’s their Kickstarter page.

“In general, I like trees, but here, they are against our theory.“

The Atlantic: Welcome to Pleistocene Park. “In Arctic Siberia, Russian scientists are trying to stave off catastrophic climate change—by resurrecting an Ice Age biome complete with lab-grown woolly mammoths.” By Ross Andersen, April 2017 Issue.

Includes a documentary film (26 minutes) and the audio version of the article (1 hour).

““Pleistocene Park is meant to slow the thawing of the permafrost,“ Nikita told me. The park sits in the transition zone between the Siberian tundra and the dense woods of the taiga. For decades, the Zimovs and their animals have stripped away the region’s dark trees and shrubs to make way for the return of grasslands. Research suggests that these grasslands will reflect more sunlight than the forests and scrub they replace, causing the Arctic to absorb less heat. In winter, the short grass and animal-trampled snow will offer scant insulation, enabling the season’s freeze to reach deeper into the Earth’s crust, cooling the frozen soil beneath and locking one of the world’s most dangerous carbon-dioxide lodes in a thermodynamic vault.

To test these landscape-scale cooling effects, Nikita will need to import the large herbivores of the Pleistocene. He’s already begun bringing them in from far-off lands, two by two, as though filling an ark. But to grow his Ice Age lawn into a biome that stretches across continents, he needs millions more. He needs wild horses, musk oxen, reindeer, bison, and predators to corral the herbivores into herds. And, to keep the trees beaten back, he needs hundreds of thousands of resurrected woolly mammoths.”

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