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In weird Brazilian cave insects, male-female sex organs reversed
By Will Dunham WASHINGTON (Reuters) - This may be the role reversal to end all role reversals. That's why I was really surprised to see the structure," entomologist Kazunori Yoshizawa of Japan's Hokkaido University said by email. Yoshizawa said that although sex-role reversal has been documented in several different types of animals, these insects are the sole example in which the "intromittent organ" - the male sex organ - is reversed, Yoshizawa said. Yoshizawa said the females of Neotrogla can hold male mates coercively using their gynosome.
SpaceX rocket lifts off for space station cargo run
By Irene Klotz CAPE CANAVERAL, Florida (Reuters) - An unmanned Falcon 9 rocket blasted off from Cape Canaveral Air Force Station in Florida on Friday to deliver a cargo capsule to the International Space Station for NASA. The 208-foot-tall (63-meter-tall) rocket, built and operated by privately owned Space Exploration Technologies, or SpaceX, bolted off its seaside launch pad at 3:25 p.m. EDT, darting through overcast skies as it headed toward orbit. The Dragon cargo ship, which is loaded with about 5,000 pounds (2,300 kg) of equipment, science experiments and supplies, is due to reach the station on Sunday. "The rocket flight was perfect as far as we could tell," SpaceX chief executive and founder Elon Musk told reporters at a news conference after launch.
NASA robotic spacecraft ends mission with crash into the moon
By Irene Klotz CAPE CANAVERAL, Florida (Reuters) - A robotic U.S. spacecraft ended a pioneering mission to map dust and gases around the moon with a planned, kamikaze crash into the lunar surface early on Friday, NASA officials said. The Lunar Atmosphere and Dust Environment Explorer, or LADEE, had been flying at increasingly lower altitudes to study how dust is lifted off the lunar surface and what gases comprise the moon's so-called exosphere - the region of space surrounding the airless moon. NASA officials had planned to crash the spacecraft into the moon, after it transmitted its final batch of data. Before hitting the lunar surface, LADEE was traveling at 3,600 mph, three times faster than a high-powered rifle bullet, so the spacecraft not only broke apart upon impact, but pieces of it likely vaporized.
In a cloning first, scientists create stem cells from adults
By Sharon Begley NEW YORK (Reuters) - Scientists have moved a step closer to the goal of creating stem cells perfectly matched to a patient's DNA in order to treat diseases, they announced on Thursday, creating patient-specific cell lines out of the skin cells of two adult men. The advance, described online in the journal Cell Stem Cell, is the first time researchers have achieved "therapeutic cloning" of adults. Technically called somatic-cell nuclear transfer, therapeutic cloning means producing embryonic cells genetically identical to a donor, usually for the purpose of using those cells to treat disease. But nuclear transfer is also the first step in reproductive cloning, or producing a genetic duplicate of someone - a technique that has sparked controversy since the 1997 announcement that it was used to create Dolly, the clone of a ewe.
Scientists find Earth-sized world in orbit friendly to life
The discovery, announced on Thursday, is the closest scientists have come so far to finding a true Earth twin. The star's outermost planet, designated Kepler-186f, receives about one-third the radiation from its parent star as Earth gets from the sun, meaning that high noon on this world would be roughly akin to Earth an hour before sunset, said astronomer Thomas Barclay, with NASA's Ames Research Center in Moffett Field, California. "This planet is an Earth cousin, not an Earth twin," said Barclay, who is among a team of scientists reporting on the discovery in the journal Science this week. NASA launched its Kepler space telescope in 2009 to search about 150,000 target stars for signs of any planets passing by, or transiting, relative to the telescope's point of view.
Improbable Resurrections: 5 Real Cases of Coming Back to Life
On Easter Sunday, Christians around the world will celebrate Jesus Christ's resurrection, in which he is said to have risen from the dead three days after his crucifixion, according to the New Testament. One of the more miraculous medical recoveries in recent years have been from infections with the "brain-eating" amoeba Naegleria fowleri.
Pot of Gold: Innovation Helps Cannabis Industry Flourish
DENVER ? The legalization of recreational marijuana sales in Colorado is turning an underground industry into a big business ? and ushering in innovations in everything from genetics to growing methods. "Every single day, someone is reinventing the wheel, so to speak," said Scott Reach, a cannabis breeder and owner of the Colorado-based seed company Rare Dankness. This 4/20 weekend, businessmen like Reach will be setting up shop in downtown Denver for the Official 420 Rally, a celebration of all things weed that's expected to be the largest in the city's history. Medicinal use of marijuana has been legal under Colorado state law since 2000, when voters approved an amendment to the state constitution allowing cannabis possession and use with a doctor's order.
5 Unanswered Questions About Jesus
As Christians worldwide gather for Easter to celebrate their belief in the death and rebirth of Jesus, researchers continue to delve into the mysteries that surround the man. The following are five questions about Jesus that, for now, at least, remain unanswered. In 2008, astronomer Dave Reneke argued that the Star of Bethlehem (a celestial event long associated with Jesus' birth) may have been Venus and Jupiter coming together to form a bright light in the sky. Other researchers have claimed that a similar conjunction between Saturn and Jupiter occurred in October of 7 B.C. Still others have claimed that Jesus was born in the spring, based on stories about shepherds watching over their flocks in fields on the night of Jesus' birth ? something they would have done in the spring, not the winter.
Cousin of Earth: Planet Kepler-186f May Be Habitable for Life (Op-Ed)
Seth Shostak is a Senior Astronomer with the SETI Institute. It's the brass ring that teams of astronomers from far and wide have tried to grab: Discovering a planet that sports an environment similar to our own.
SpaceX Dragon Makes Easter Delivery at International Space Station
It's not exactly the Easter bunny, but a commercial Dragon cargo ship built by SpaceX made an Easter delivery to the International Space Station Sunday (April 20) to deliver tons supplies, and possibly even some treats, for the astronauts on board.
NASA Moon Probe Will Bite the Lunar Dust Soon: What It Taught Us
A NASA probe orbiting the moon will literally bite the lunar dust within the next week or so when it crashes into the moon's far side. LDEX has churned out large amounts of data about the moon's dust exosphere, Kempf said, and deepened insight into the physics of the phenomenon.
Scientists find Earth-sized world in orbit friendly to life
The discovery, announced on Thursday, is the closest scientists have come so far to finding a true Earth twin. The star?s outermost planet, designated Kepler-186f, receives about one-third the radiation from its parent star as Earth gets from the sun, meaning that high noon on this world would be roughly akin to Earth an hour before sunset, said astronomer Thomas Barclay, with NASA?s Ames Research Center in Moffett Field, California. ?This planet is an Earth cousin, not an Earth twin,? said Barclay, who is among a team of scientists reporting on the discovery in the journal Science this week. NASA launched its Kepler space telescope in 2009 to search about 150,000 target stars for signs of any planets passing by, or transiting, relative to the telescope?s point of view.
Scientists discover first Earth-sized planet that could support life
For the first time, scientists have discovered an Earth-sized alien planet in the habitable zone of its host star, an "Earth cousin" that just might have liquid water and the right conditions for life. The newfound planet, called Kepler-186f, was first spotted by NASA's Kepler space telescope and circles a dim red dwarf star about 490 light-years from Earth. "One of the things we've been looking for is maybe an Earth twin, which is an Earth-sized planet in the habitable zone of a sunlike star," Tom Barclay, Kepler scientist and co-author of the new exoplanet research, told Space.com.
Jaws, the prequel: Scientists find the 'Model T Ford' of sharks
By Will Dunham WASHINGTON (Reuters) - You've heard of the Model T Ford, the famed early 20th-century automobile that was the forerunner of the modern car. Scientists on Wednesday announced the discovery of the impeccably preserved fossilized remains of a shark that lived 325 million years ago in what is now Arkansas, complete with a series of cartilage arches that supported its gills and jaws. Because shark skeletons are made of soft cartilage, not hard bone, finding anything more than scrappy fossilized remains of teeth and vertebrae is rare. Finding a fossil shark in an almost three-dimensional state of preservation, boasting important skeletal structures, is exceptional.
Oh baby: Scientists find protein that lets egg and sperm hook up
If you really want to learn how babies are made, you need to know about Juno and Izumo. Fertilization takes place when an egg cell and a sperm cell recognize one another and fuse to form an embryo. Researchers said on Wednesday they have identified a protein on the egg cell's surface that interacts with another protein on the surface of a sperm cell, allowing the two cells to join. This protein, dubbed Juno in honor of the ancient Roman goddess of fertility and marriage, and its counterpart in sperm, named Izumo after a Japanese marriage shrine, are essential for reproduction in mammals including people, they said.
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