Researchers from Harvard Medical School and Beth Israel Deaconess Medical Center have captured and sequenced tiny pieces of collagen protein from a 68 million-year-old Tyrannosaurus rex. The protein fragments—seven in all—appear to most closely match amino acid sequences found in collagen of present day chickens.
Are birds and dinosaurs are evolutionarily related?
Researchers from Harvard Medical School and Beth Israel Deaconess Medical Center captured and sequenced tiny pieces of collagen protein from a 68 million-year-old Tyrannosaurus rex and a 160,000- to 600,000-year-old mastodon. The T. rex sequences are the oldest ever to be reported. Courtesy Zina Deretsky, National Science Foundation)
Groundbreaking international legal principles on sexual orientation, gender identity, and international law have been released by 29 international human rights experts, led by University of Nottingham academic, Professor Michael O'Flaherty.
The "Yogyakarta Principles" call for worldwide action against violence, discrimination and abuse, by governments, the UN human rights system, national human rights institutions, non-governmental organisations, and others.
A new technology developed at the University of Toronto is revealing biochemical processes responsible for diseases such as cystic fibrosis and could one day pave the way for pharmaceutical applications.
The "iMYTH-system" shows a positive readout of our iMYTH sytem. If two proteins interact in iMYTH system the yeast cell will stain blue. Credit: Staglar lab
A remarkable eclipse of a supermassive black hole and the hot gas disk around it has been observed with NASA's Chandra X-ray Observatory. This eclipse has allowed two key predictions about the effects of supermassive black holes to be tested.
Just as eclipses of the Sun and moon give astronomers rare opportunities to learn about those objects, an alignment in a nearby galaxy has provided a rare opportunity to investigate a supermassive black hole.
The large image shows an optical view of NGC 1365 from the ESO Very Large Telescope and the inset shows the Chandra X-ray Observatory view of the center of this galaxy.
ESA's Darwin mission aims to discover extrasolar planets and examine their atmospheres for signs of life, particularly for the presence of certain life-related chemicals such as oxygen and carbon dioxide. The major technical challenge lies in distinguishing, or resolving, the light from an extrasolar planet from the hugely overwhelming radiation emitted by the planet's nearby star.
Darwin will combine light from four or five telescopes and send it down to Earth. Credits: ESA
Cluster is providing new insights into the working of a ‘space tsunami’ that plays a role in disrupting the calm and beautiful aurora, or northern lights, creating patterns of auroral dances in the sky.
The image to the left is the typical appearance of the aurora before a magnetic substorm. During a substorm, the single auroral ribbon may split into several ribbons (centre) or even break into clusters that race north and south (right). Credits: Jan Curtis