Turn and shoot the
Question: "What about the sun?". "He went to sleep," his
mother answered thinking an explanation that satisfies the curiosity of his
three years. "He night," says halfway between the statement and the
question and question again looking at the sky: "What about the moon? In
these sentences, little seems to sum up, with its childlike simplicity-the
concerns, from primitive man to the present day, led mankind to observe the sky
for answers to many questions.
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Tuesday, July 23, 2013
Monday, July 22, 2013
Mars suffered early loss of most of the atmosphere
When I was a young man
with less than 500 million years ago, Mars suffered a catastrophe that hung its
magnetic field, leave it exposed to strong solar winds and caused him to lose
most of its atmosphere. This is the most plausible story for children on the
planet, according to the latest findings of the rover Curiosity.
The conclusion is in
two studies published today in the journal "Science" that reveal with
unprecedented precision the composition of air on Mars.
A study warns that sea level may rise 20 meters by the end of the century
The ice of the
Antarctic "is much more sensitive" to climate changes than estimated,
according to a scientific study which says that sea level could rise 20 meters
to the end of the century if this area, the West Antarctic and Greenland, were
to melt as in the Pliocene.
These are two of the
findings of an international study published in the journal Nature Geo science,
led by researchers from Imperial College London and Spanish participation.
Chemically induced pluripotent stem cells
Scientists have been
able to reprogram the mature human stem cells, using only the chemical compound
(without genetic manipulation).
A new method of
obtaining cells are as versatile as embryonic stem cells, reduces the risk of
developing cancer or of mutations that can occur as a result of stem cell
therapies, "reprogrammed" with the introduction of additional genes.
Since then, in 2006, it
was announced the discovery of induced pluripotent stem cells ( iPSCs ),
scientists have sought to reduce the number of additional genes required for
such cells. But it is always required at least one encoding a protein Oct-4 .
Fourth domain for a new form of life
The famous anecdote
"On board the space station discovered a giant virus that infected Soviet
cosmonaut" may be not so absurd: Biologists have discovered a virus of
such size that they have no right to believe in it.
Initially called it
simply - NLF, a new form of life (New Life Form). Strange body, a dedicated
French microbiologist from sea water samples, pick up off the coast of Chile,
infects the simplest - amoebas. Soon, the same body showed up and in Australia.
Sunday, July 21, 2013
Student Engineers Spark Zero-Gravity Fires on Weightless Wild Ride
Gravity, we
have defied you. Seven university student teams from across the United States
escaped the pull of Earth's gravity — if only for a few seconds — on a NASA
microgravity flight to see how fire, liquids and magnets behave in weightlessness.
The students flew with
NASA's Microgravity University Program Friday (July 19) aboard a Zero Gravity
Corporation Boeing 727 jet modified to fly up and down on a parabolic path to
create up to 30 seconds of zero gravity, moon gravity or Martian gravity on the
downswing followed by periods of "hypergravity" (twice Earth's pull)
on the way back up.
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