[7463] in linux-announce channel archive
Investigate your neighbor
daemon@ATHENA.MIT.EDU (Instant Check Mate)
Fri Aug 2 06:54:53 2013
Date: Fri, 2 Aug 2013 03:54:52 -0700
To: linuxch-announce.discuss@charon.mit.edu
From: "Instant Check Mate" <InstantCheckMate@hedanzmtc.info>
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useum, after
announcing the discovery.Wooly mammoths are thought to have died out around
10,000 years ago, although scientists think small groups of them lived longer
in Alaska and on Russia's Wrangel Island off the Siberian coast.A growing
chorus of scientists have been targeting the mammoth for so called de-extinction
in recent years, at the same time that others argue against tampering
with Mother Natures plans. Bringing back a dead species raises a host
of issues, wrote two ethicists recently.RELATED: Boy in Alaska Finds Mammoth
Tooth"The critical ethical issue in re-creating extinct species, or in creating
new kinds of animals, is to first determine through careful scientific study
what is in their interests and to ensure that they live good
lives in the world in which they are create," wrote Julian Savulescu,
who studies ethics at Monash University, and Russell Powell, a philosophy
professor at Boston University."If we are confident that a cognitively sophisticated
organism, such as a mammoth, would lead a good life, this may
provide moral reasons to create it whether or not that animal
is a clone of a member of an extinct lineage."
17 animals scientists want to
bring back from extinction
Giant Ice-Age Mammals Brought to Life
This handout image provided by the Smithsonian National Air and Space Museum
shows an X-ray of an extravehicular (EV) overshoe that was designed to
be worn over the Apollo spacesuit boots while an astronaut was walking
on the Moon and a 1964 A4-H Universal helmet, showing in the
x-ray ball bearings in the neck ring that allowed the helmet to
move right and left without restriction.APThe familiar exteriors of astronauts'
spacesuits often hide all of the ingenuity and mechanics that are built
inside the suits, which were first imagined as "wearable spacecraft."Now
a new art exhibit, "Suited for Space," opening Friday at the Smithsonian's
National Air and Space Museum, highlights the creativity behind the suits
that allowed humans to explore the moon and aspire to fly farther
from Earth.X-ray images and photographs show the suits in intricate detail,
said space history curator Cathleen Lewis. The museum's X-rays are the first
such images ever created to study, conserve and research the nation's spacesuits.VIDEO:
Sleeping in a Space Station"You don't realize what a complex machine these
are," Lewis said. But the X-rays of Alan Shepard's Apollo spacesuit and
a 1960s prototype "allow visitors to see beyond what is visible to
the naked eye, through the protective layers of the suit to see
the substructures that are embedded inside."The exhibition traces the evolution
of the spacesuit from the early high-altitude test flight suits of the
1930s
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<p style="font-size:xx-small;"> to the dawn of the space age with Mercury, Gemini, Apollo
and space shuttle missions.While technology drove much of the suit design
to maintain an airtight barrier to the vacuum of space and to
protect from solar radiation, fashion aesthetics of the time also played
a role, Lewis said. The original Mercury seven astronaut suits were unique
from all others with a silvery coating to introduce America's space explorers
to the world."NASA had a demand to create the astronauts into a
whole new corps, a non-military corps. So here was an opportunity to
dress them in a new uniform ... that evokes sensibilities of that
Buck Rogers imagination," she said. "All of these guys, the engineers, they
grew up on science fiction. They fed it with their ideas, and
they were consumers of it at the same time."Curators are working to
find ways to preserve spacesuits because some materials are decomposing,
discoloring or becoming rigid some 50 years after they were created.The
spacesuit show is traveling to 10 cities, moving next to Tampa, Fla.,
Philadelphia and Seattle through 2015.VIDEO: Russian Rocket Explodes on
Live TVTwo companion exhibits at the National Air and Space Museum also
highlight 50 artworks of about 550 new items added to the Smithsonian's
growing space art collection over the past decade. They include portraits
of astronomer Carl Sagan and astrophysicist Neal deGrasse Tyson, and a photograph
of first female shuttle commander Eileen Collins
told FoxNews.com. (The stem
cells) can repair tissue damage caused by chemo radiotherapy, so those patients
will tolerate chemotherapy much better. It gives enough room for clinicians
to use a high dose of chemotherapy to kill cancer and
the patient can survive.Through a series of in vitro experiments, Geng and
his team analyzed cells in the GI tract, stumbling upon an important
molecule called ROBO1. They found that ROBO1 was specifically expressed
in intestinal stem cells but not in any other cells in
the body. Upon this discovery, the researchers added to the cells a
protein called SLIT2, which binds to ROBO1.The result: stem cell regeneration.Basically,
you add SLIT2, you have more intestinal stem cells, Geng explained. If
you have more intestinal stem cells, you repair more tissue damage, just
like in general cell replication. So the ability to repair damage is
higher its just the logical explanation.The researchers theorized that
by increasing stem cells in the gut, the intestine and GI tract
are better protected from the effects of chemotherapy, allowing cancer patients
to ingest nutrients and perform critical functions without releasing intestinal
toxins into the blood circulation.To test this idea, Geng experimented with
hundreds of mice with late-stage, metastatic cancer. All of the mice received
a lethal dose of chemotherapy, but only half were given SLIT2 or
an analogous protein called R-SPONDIN1 to stimulate intestinal
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