SciByte

read about the fireball and recalled hearing a sound on her roof that night

she and neighbors found a ding on the roof

On closer inspection, that crust was a product of weathering of a natural rock, not from the heat of entry

Examination of the rock under a petrographic microscope quickly revealed the stone was not a meteorite

the ding on Webber's roof, along with her recollection of the sound she heard that night, suggest her house may in fact have been hit by a still-missing meteorite.

r Marin and Sonoma counties

Maya leader Gomez urged the Tourism Institute to rethink the doomsday celebration, which he criticized as a "show" that was disrespectful to Mayan culture.

Oxlajuj Ajpop is holding events it considers sacred in five cities to mark the event and Gomez said the Culture Ministry would be wise to throw its support behind their real celebrations

The Mayan calendar has

18 months of 20 days each plus a sacred month, "Wayeb," of five days

B'aktun" is the larget unit in the time cycle system, and is about 400 years

broader era spans 13 B'aktun, or about 5,200 years.

includes findings from both animal and human breast cancer models.

Under normal circumstances, Elf5 is a transcription factor that controls the genes that allow for milk production

epithelial cells in the mammary glands also became more mesenchymal, that is, more like stem cells, an early harbinger of cancer

when Elf5 levels are low or absent, epithelial cells become more like stem cells, morphing into mesenchymal cells, changing their shape and appearance and migrating elsewhere in the body

how cancer spreads

Elf5 keeps normal breast cells in their current shape and restricts their movement

the protein

suppressing the epithelial-mesenchymal transition by directly repressing transcription of Snail2, a master regulator of mammary stem cells known to trigger the EMT

Elf5 loss is frequently detected early

experiments

conducted

also found that little or no Elf5 in human breast cancer samples correlated with increased morbidity.

loss of Elf5 is an initial event in the disease

could also be an important diagnostic tool

how early does the loss of Elf5 occur?

use loss of Elf5 as a reliable diagnostic tool?"

EMT-Snail 2 pathway is a valuable one to target for early breast cancer intervention

prospect of visiting another comet without having to build and launch a new spacecraft

seemed too good to pass up

best option, it seemed, was a comet called 85P/Boethin

would be drawing close to Earth in 2008

Comet Boethin had not been sighted in almost 20 years

seen on only two occasions—at its 1975 discovery and on its subsequent orbit around the sun, in 1986

roughly 11-year elliptical orbit placed it in the class of so-called short-period comets

another pass through the inner solar system in 1997

positioned on the opposite side of the sun from Earth, precluding astronomers from getting another look at it

2008, when Boethin was to return once more

emit up to a thousand times the energy output of the Milky Way.

More than 200,000 quasars are known

If the beam shines in Earth's direction

can appear as a quasar that can outshine its surrounding galaxy a hundred or a thousand times.

first identified in the Sloan Digital Sky Survey (SDSS).

Only a handful of these very distant ultra-luminous quasars were found by the SDSS in about one quarter of the whole sky

monitor alpha (resting state) and beta (active state) brainwaves

converted to a signal that is broadcast, via Bluetooth technology, to the user's smartphone

claims that Muse can be used to learn new ways to relax, recognize lapses in concentration, build self-confidence, and gain more control of one's thoughts, overall

app includes a series of lessons and exercises designed to teach the user how to manipulate brain waves using visual feedback

has been thought that the quasar has been feeding on a handful of stars every year in order to bulk up to its size of three billion solar masses over just a few hundred million years. But where are all the stars

Near infrared views with the Hubble Space Telescope’s Wide Field Camera 3 are only providing hints of what might be taking place

galaxy is so enshrouded with dust that none of the starlight can be seen

only the bright, blaring quasar shines through

most early galaxies contain hardly any dust

the early universe was dust-free until the first generation of stars started making dust through nuclear fusion

quasar was first identified in the Sloan Digital Sky Survey (SDSS) and the follow-up submillimeter observations showed significant dust but not how and where

If you want to hide the stars with dust

make lots of short-lived massive stars earlier on that lose their mass at the end of their lifetime

used Hubble to very carefully subtract light from the quasar image and look for the glow of surrounding stars.

remarkable

Hubble didn’t find any of the underlying galaxy

Because we don’t see the stars, we can rule out that the galaxy that hosts this quasar is a normal galaxy

It’s among the dustiest galaxies in the universe

so widely distributed that not even a single clump of stars is peeking through

Flight Engineer Evgeny Tarelkin

essentially acts the same as a breath strip, sticking to your mouth and dissolving in your saliva

researchers, who are now based at the University of New Mexico

currently working on a strip to treat more severe burns that last two to three days

American astronaut Kevin Ford of NASA

Russian cosmonauts Oleg Novitskiy

Evgeny Tarelkin

stay until March

launched into space on Tuesday (Oct. 23

second half of the space station's six-person Expedition 33 crew

bringing some fishy friends to the space station

ferrying 32 small medaka fish to the space station so they can be placed inside a tank, called the Aquatic Habitat, for an experiment to study how fish adapt to weightlessness.

robotic Dragon space capsule

depart the space station on Sunday (Oct. 28)

will return nearly 2,000 pounds (907 kilograms) of science experiment hardware and other gear back to Earth.

Wednesday (Oct. 31), an unmanned Russian Progress spacecraft will launch toward the space station and arrive six hours later to make a Halloween delivery of food, equipment and other Halloween treats.