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-
Japan Will Launch a Cargo Ship to Space Station Friday: Watch It Live
A Japanese cargo vessel will launch toward the International Space Station tomorrow morning (Dec. 9), and you can watch the liftoff live. -
North Korea 'capable of attaching nuclear warheads to missiles'
North Korea is now capable of attaching nuclear warheads to missiles but has not mastered hitting a target, a senior US defence official has said. Pyongyang has conducted a series of missile launches in the wake of its fourth nuclear test in January, despite international condemnation. Experts have concluded North Korea is able to make nuclear warheads small enough to arm Scud missiles, but it is unclear if they can put weapons on larger rockets which travel further and can deploy warheads from -
'Godspeed, John Glenn': Public hails hero of space, politics
Tributes poured in for former astronaut and U.S. Sen. John Glenn, who died Thursday at age 95. Politicians, astronauts, educators and others repeatedly called him a hero with many mentioning the phrase that first sent him into orbit: "Godspeed, John Glenn." -
Quotes from John Glenn: 'Zero-G and I feel fine.'
A sampling of quotes from John Glenn: -
John Glenn Memories: Astronauts & More Mourn American Icon on Twitter
John Glenn, the first American astronaut to orbit Earth and a former U.S. senator, died today in a hospital in Ohio, his home state. Friends and fans of the late astronaut, including fellow astronauts, scientists, politicians and other dignitaries, shared their condolences on social media. Here are some of the most poignant remembrances.We are saddened by the loss of Sen. John Glenn, the first American to orbit Earth. A true American hero. Godspeed, John Glenn. Ad astra. pic.twitter. ... -
[Erratum]Erratum for the Research Article: "A computationally identified compound antagonizes excess FGF-23 signaling in renal tubules and a mouse model of hypophosphatemia" by Z. Xiao, D. Riccardi, H. A. Velazquez, A. L. Chin, C. R. Yates, J. D. Carrick,
The author affiliations now appear in the correct order. -
Researchers sound alarm over millions of tonnes of plastic dumped into oceans
via cbc.caMembers of an international organization based in Denmark that aims to raise awareness about the consequences of the increasing plastic pollution of the oceans, are set to collect data and measure levels of micro-plastics floating in the water. -
John Glenn, first American to orbit Earth, dies aged 95
via bbc.co.ukFormer astronaut John Glenn, the first American to orbit Earth, dies aged 95. -
7 penguins drown at Calgary Zoo
via cbc.caSeven Humboldt penguins were found dead at the back of the Penguin Plunge exhibit at the Calgary Zoo on Thursday. -
John Glenn: First US astronaut to orbit Earth dies
via bbc.co.ukFormer astronaut John Glenn, the first American to orbit Earth, dies aged 95. Pallab Ghosh looks back at the day he made history. -
Devastating decline for the giraffe
Over 700 newly recognized bird species have been assessed for the latest update of The IUCN Red List of Threatened SpeciesTM, and 11% of them are threatened with extinction. The update also reveals a devastating decline for the giraffe, driven by habitat loss, civil unrest and illegal hunting. The global giraffe population has plummeted by up to 40% over the last 30 years, and the species has been listed as Vulnerable on the IUCN Red List. -
Former astronaut, U.S. senator John Glenn dead at 95
via cbc.caJohn Glenn, whose life took him to the celestial heights as the first American to orbit in space, then into the trenches of congressional infighting as a longtime Democratic senator, before he re-entered space as a 77-year-old, has died. -
10 things to know about John Glenn, who has died at 95
WASHINGTON (AP) — Ten notable aspects of the life of astronaut and senator John H. Glenn Jr. who died Thursday at 95: -
John Glenn, First American to Orbit the Earth, Dies at 95
John Glenn, the first American to orbit the Earth, died today (Dec. 8). The former astronaut and U.S. senator was being hospitalized at the Wexner Medical Center at Ohio State University in Columbus when he died. "We are saddened by the loss of Sen. John Glenn, the first American to orbit Earth. -
Pioneering nanotechnology captures energy from people
Engineering researchers have created a new way to harvest energy from human motion, using a film-like device that actually can be folded to create more power. -
Climate change is already causing widespread local extinction in plant and animal species
Extinctions related to climate change have already happened in hundreds of plant and animal species around the world. New research shows that local extinctions have already occurred in 47% of the 976 plant and animal species studied. -
[Working Life] Following my lucky star
Author: Nancy Grace Roman -
[This Week in Science] Time is a subjective experience
Author: Peter Stern -
[This Week in Science] Super sensitive, not so silly, putty
Author: Marc S. Lavine -
[This Week in Science] Substituting minutes for money
Author: Gilbert Chin -
[This Week in Science] Probing the intergalactic magnetic field
Author: Keith T. Smith -
[This Week in Science] Pacemaker of the ice ages, 40 years on
Author: Julia Fahrenkamp-Uppenbrink -
[This Week in Science] Mapping genetic adaptations to pollution
Author: Laura M. Zahn -
[This Week in Science] Inhibiting calcium uptake ubiquitously
Author: Wei Wong -
[This Week in Science] Engineering cells to regulate glucose
Author: Valda Vinson -
[This Week in Science] Diseases emerge when forests degrade
Author: Shahid Naeem -
[This Week in Science] Crafting chiral boron building blocks
Author: Jake Yeston -
[This Week in Science] Cooperation between frustrated partners
Author: Jake Yeston -
[This Week in Science] Catching a break in polyphenol synthesis
Author: Jake Yeston -
[This Week in Science] Birds of a feather sing together
Author: Peter Stern -
[This Week in Science] Beating the curse of the parasite
Author: Guy Riddihough -
[This Week in Science] Aspects of the design
Author: Marc S. Lavine -
[This Week in Science] An edge that is hard to get rid of
Author: Jelena Stajic -
[This Week in Science] A mitochondrial target for slowing PD
Author: Orla M. Smith -
[This Week in Science] A laboratory model of viral speciation
Author: Laura M. Zahn -
[Review] The broadening reach of frustrated Lewis pair chemistry
The revelation that combinations of Lewis acids and bases for which dative bonding is impeded can activate dihydrogen led to the concept of “frustrated Lewis pairs” (FLPs). Over the past decade, a range of FLP systems and substrate molecules have precipitated a paradigm change in main-group chemistry and metal-free catalysis. The FLP motif has also found application in a growing body of chemical problems in organic synthesis, transition metal and free radical chemistry, materials, enzymatic -
[Report] Transient compartmentalization of RNA replicators prevents extinction due to parasites
The appearance of molecular replicators (molecules that can be copied) was probably a critical step in the origin of life. However, parasitic replicators would take over and would have prevented life from taking off unless the replicators were compartmentalized in reproducing protocells. Paradoxically, control of protocell reproduction would seem to require evolved replicators. We show here that a simpler population structure, based on cycles of transient compartmentalization (TC) and mixing of -
[Report] The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst
Fast radio bursts (FRBs) are millisecond-duration events thought to originate beyond the Milky Way galaxy. Uncertainty surrounding the burst sources, and their propagation through intervening plasma, has limited their use as cosmological probes. We report on a mildly dispersed (dispersion measure 266.5 ± 0.1 parsecs per cubic centimeter), exceptionally intense (120 ± 30 janskys), linearly polarized, scintillating burst (FRB 150807) that we directly localize to 9 square arc minutes. -
[Report] The long-run poverty and gender impacts of mobile money
Mobile money, a service that allows monetary value to be stored on a mobile phone and sent to other users via text messages, has been adopted by the vast majority of Kenyan households. We estimate that access to the Kenyan mobile money system M-PESA increased per capita consumption levels and lifted 194,000 households, or 2% of Kenyan households, out of poverty. The impacts, which are more pronounced for female-headed households, appear to be driven by changes in financial behavior—in particul -
[Report] The genomic landscape of rapid repeated evolutionary adaptation to toxic pollution in wild fish
Atlantic killifish populations have rapidly adapted to normally lethal levels of pollution in four urban estuaries. Through analysis of 384 whole killifish genome sequences and comparative transcriptomics in four pairs of sensitive and tolerant populations, we identify the aryl hydrocarbon receptor–based signaling pathway as a shared target of selection. This suggests evolutionary constraint on adaptive solutions to complex toxicant mixtures at each site. However, distinct molecular variants a -
[Report] Synthesis of resveratrol tetramers via a stereoconvergent radical equilibrium
Persistent free radicals have become indispensable in the synthesis of organic materials through living radical polymerization. However, examples of their use in the synthesis of small molecules are rare. Here, we report the application of persistent radical and quinone methide intermediates to the synthesis of the resveratrol tetramers nepalensinol B and vateriaphenol C. The spontaneous cleavage and reconstitution of exceptionally weak carbon-carbon bonds has enabled a stereoconvergent oxidativ -
[Report] Sensitive electromechanical sensors using viscoelastic graphene-polymer nanocomposites
Despite its widespread use in nanocomposites, the effect of embedding graphene in highly viscoelastic polymer matrices is not well understood. We added graphene to a lightly cross-linked polysilicone, often encountered as Silly Putty, changing its electromechanical properties substantially. The resulting nanocomposites display unusual electromechanical behavior, such as postdeformation temporal relaxation of electrical resistance and nonmonotonic changes in resistivity with strain. These phenome -
[Report] Robust spin-polarized midgap states at step edges of topological crystalline insulators
Topological crystalline insulators are materials in which the crystalline symmetry leads to topologically protected surface states with a chiral spin texture, rendering them potential candidates for spintronics applications. Using scanning tunneling spectroscopy, we uncover the existence of one-dimensional (1D) midgap states at odd-atomic surface step edges of the three-dimensional topological crystalline insulator (Pb,Sn)Se. A minimal toy model and realistic tight-binding calculations identify -
[Report] Mind the gap: Neural coding of species identity in birdsong prosody
Juvenile songbirds learn vocal communication from adult tutors of the same species but not from adults of other species. How species-specific learning emerges from the basic features of song prosody remains unknown. In the zebra finch auditory cortex, we discovered a class of neurons that register the silent temporal gaps between song syllables and are distinct from neurons encoding syllable morphology. Behavioral learning and neuronal coding of temporal gap structure resisted song tutoring from -
[Report] Midbrain dopamine neurons control judgment of time
Our sense of time is far from constant. For instance, time flies when we are having fun, and it slows to a trickle when we are bored. Midbrain dopamine neurons have been implicated in variable time estimation. However, a direct link between signals carried by dopamine neurons and temporal judgments is lacking. We measured and manipulated the activity of dopamine neurons as mice judged the duration of time intervals. We found that pharmacogenetic suppression of dopamine neurons decreased behavior -
[Report] How boundaries shape chemical delivery in microfluidics
Many microfluidic systems—including chemical reaction, sample analysis, separation, chemotaxis, and drug development and injection—require control and precision of solute transport. Although concentration levels are easily specified at injection, pressure-driven transport through channels is known to spread the initial distribution, resulting in reduced concentrations downstream. Here we document an unexpected phenomenon: The channel’s cross-sectional aspect ratio alone can con -
[Report] Ecological speciation of bacteriophage lambda in allopatry and sympatry
Understanding the conditions that allow speciation to occur is difficult because most research has focused on either long-lived organisms or asexual microorganisms. We propagated bacteriophage λ, a virus with rapid generations and frequent recombination, on two Escherichia coli host genotypes that expressed either the LamB or OmpF receptor. When supplied with either single host (allopatry), phage λ improved its binding to the available receptor while losing its ability to use the alternative. -
[Report] Dopamine neurons encode performance error in singing birds
Many behaviors are learned through trial and error by matching performance to internal goals. Yet neural mechanisms of performance evaluation remain poorly understood. We recorded basal ganglia–projecting dopamine neurons in singing zebra finches as we controlled perceived song quality with distorted auditory feedback. Dopamine activity was phasically suppressed after distorted syllables, consistent with a worse-than-predicted outcome, and was phasically activated at the precise moment of the -
[Report] β-cell–mimetic designer cells provide closed-loop glycemic control
Chronically deregulated blood-glucose concentrations in diabetes mellitus result from a loss of pancreatic insulin-producing β cells (type 1 diabetes, T1D) or from impaired insulin sensitivity of body cells and glucose-stimulated insulin release (type 2 diabetes, T2D). Here, we show that therapeutically applicable β-cell–mimetic designer cells can be established by minimal engineering of human cells. We achieved glucose responsiveness by a synthetic circuit that couples glycolysis-mediated c -
[Report] A general, modular method for the catalytic asymmetric synthesis of alkylboronate esters
Alkylboron compounds are an important family of target molecules, serving as useful intermediates, as well as end points, in fields such as pharmaceutical science and organic chemistry. Facile transformation of carbon-boron bonds into a wide variety of carbon-X bonds (where X is, for example, carbon, nitrogen, oxygen, or a halogen), with stereochemical fidelity, renders the generation of enantioenriched alkylboronate esters a powerful tool in synthesis. Here we report the use of a chiral nickel
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