- Bacteria may be harbingers of invisible damage in concrete
News release • August 31, 2015 • By Diane Kukich
Photos by Evan Krape
New research from UAlberta grad Victoria Arbour suggests that tails of some ankylosaurs evolved from flexible to stiff to support mace-like tail clubs.
Cardiff University experts provide first direct evidence of galaxy ‘metamorphosis’
A team of international scientists, led by astronomers from the School of Physics and Astronomy, has shown for the first time that galaxies can change their structure over the course of their lifetime.
By observing the sky as it is today, and peering back in time using the Hubble and Herschel telescopes, the team have shown that a large proportion of galaxies have undergone a major ‘metamorphosis’ since they were initially formed after the Big Bang.
By providing the first direct evidence of the extent of this transformation, the team hope to shed light on the processes that caused these dramatic changes, and therefore gain a greater understanding of the appearance and properties of the Universe as we know it today.
ROANOKE, Va., Aug. 31, 2015 – Neuroscientists know that some connections in the brain are pruned through neural development. Function gives rise to structure, according to the textbooks. But scientists at the Virginia Tech Carilion Research Institute have discovered that the textbooks might be wrong.
Astrophysics & Cosmology, Dark energy, Dark matter, Kavli Institute for Particle Astrophysics & Cosmology (KIPAC), Large Synoptic Survey Telescope (LSST), Particle Physics & Astrophysics, Science, The Early Universe
The Large Synoptic Survey Telescope’s ‘Eye’ Will be Built at SLAC
Menlo Park, Calif. — The Department of Energy has approved the start of construction for a 3.2-gigapixel digital camera – the world’s largest – at the heart of the Large Synoptic Survey Telescope (LSST). Assembled at the DOE’s SLAC National Accelerator Laboratory, the camera will be the eye of LSST, revealing unprecedented details of the universe and helping unravel some of its greatest mysteries.
Ήλιος Βεργίνας – Οικόσημο δυναστείας Αργεαδών
Όσον αφορά στην χρονική περίοδο ίδρυσης του βασιλικού Οίκου της Μακεδονίας τίποτα δεν είναι απόλυτα σαφές. Η αρχή τοποθετείται μεταξύ μύθου και ιστορίας, ο δε ιδρυτής της φέρεται να έζησε την ίδια περίπου εποχή με τον ιδρυτή του Οίκου των Αχαιμενιδών. Αυτή η σύμπτωση γίνεται ακόμη πιο ενδιαφέρουσα, αφού τον 6ο π.Χ. αιώνα ο Δαρείος Α’ πέρασε στην Ευρώπη και κατέστησε τον Αμύντα Α’ υποτελή του, εγκαινιάζοντας μία αντιπαλότητα μοιραία και για τους δύο Οίκους. Δύο αιώνες αργότερα ο Αλέξανδρος Γ΄ πέρασε στην Ασία και εκστράτευσε κατά της Αχαιμενιδικής αυτοκρατορίας. Τον τέταρτο χρόνο των εχθροπραξιών δολοφονήθηκε ο Δαρείος Γ΄, τον ενδέκατο χρόνο πέθανε ο Αλέξανδρος Γ΄ και μαζί τους πέθαναν και οι δύο βασιλικοί Οίκοι. Συνέχεια ανάγνωσης
Young wildlife photographer Nick Volpe has photographed a very rare red-coloured mouse spider, in north-western Sydney.
He says: «In the middle of suburbia alongside a busy road in Girraween, Sydney, lies a small 10-by-10m squared patch of grass in a front yard that has an infestation of the venomous eastern mouse spider (Missulena bradleyi).
The small, chunky, glossy black spiders with large fangs spend the majority of their lives underground in burrows, and only emerge to wander during the Autumn rains in search of a mate.
The property owner has recorded every specimen he has captured between late April to June every year since 2011 to 2015. In that time he has collected an astounding 960 spiders, of which he gave to private collectors and pet shops.
These infestations are so severe that up to 87 spiders have been collected in a single night. However, some very interesting and unique specimens were found among the spider hoards. In the five years of observations, the property owner has found six bright red specimens, very different to the average black spiders.
It’s likely these extremely rare spiders are expressing a genetic mutation that results in their body colouring being a stunning bright red.
A close cousin of the mouse spider, funnel-web spiders can also express variations of the red pigment.
Washington, DC— Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the Moon’s surface. Now, scientists from Brown University and the Carnegie Institution for Science have identified the volatile gas that drove those eruptions.
Joining molecular components expands ability to manipulate genes in specific cell types
Want to see where a particular gene is active? Use green fluorescent protein, or GFP, and the cells will light up. Want to turn that gene on or off in an organism? You might use an enzyme called Cre recombinase. Want to turn a gene on or off only in one cell type? That’s tough. But the job just got a lot easier: Harvard Medical School researchers have found a way to combine GFP and Cre.
Honey bees are essential for the pollination of about one third of the food we eat – including fruit, vegetables, oils, seeds and nuts – yet their health and ability to pollinate our crops is under serious threat.
To help tackle this worldwide problem, CSIRO is leading the Global Initiative for Honey bee Health – an international collaboration of researchers, beekeepers, farmers, industry, and technology companies aimed at better understanding what is harming bees and finding solutions to help secure crop pollination.