Ne’Kiya Jackson and Calcea Johnson of Louisiana published a new study proving the Pythagorean theorem using trigonometry, a feat mathematicians long thought could not be done

A blockbuster exhibition in Paris is showcasing 500 artifacts and artworks in honor of the Surrealist Manifesto, which sparked a new artistic style that spread around the world

Researchers trained African giant pouched rats to detect commonly smuggled items, including rhino horns and elephant tusks

The fragile 18th-century containers, which likely held alcoholic beverages that were shared among passengers and crew members, survived for centuries at the bottom of the Atlantic Ocean

The species may have been carried to the Sacramento–San Joaquin Delta in ballast water on ships

The pachyderm, named Kamala, was suffering from osteoarthritis when zoo staff chose to euthanize her

The Shipwreck Treasure Museum in Cornwall, England, is selling its collection, which includes items connected to nearly 150 shipwrecks

Babies who were conceived and born during the period of rationing in the United Kingdom were less likely to develop certain diseases as adults, a new study finds

On its 66th flyby of the king of planets, Juno has captured spectacular views of the stormy atmosphere, processed by citizen scientists

Lula the bear and Simba the lion have been evacuated to a wildlife shelter in Jordan

Sharks have been losing teeth for 400 million years. Here’s a guide to uncovering some of these plentiful fossils across the country

Eight years into living in Longyearbyen, on the Norwegian archipelago of Svalbard, I embrace the seasonal plunge into total darkness

Michelle Frankfurter tells the stories of these young migrants and also those of the thousands who jump aboard “the death train”

From swirling aurora borealis to bioluminescent beaches, these award-winning photographs capture rare views of our world at night

See the finalists of our 2014 photo contest and vote for the Readers' Choice winner

It's curtains for the NASA mission's close relationship with the satellite

In summer months above the North and South Poles, glowing clouds occasionally form naturally at sunset under the right conditions

It fell to Belle da Costa Greene, a Black woman whose racial identity was kept secret for decades, to catalog J.P. Morgan's immense collection of books and art

In the international competition, people with physical disabilities put state-of-the-art devices to the test as they race to complete the tasks of everyday life

Newfoundland filmmaker Justin Simms is releasing his latest film called Sons. It was prompted by the birth of his son and left him wondering how traditional masculine behaviour is learned.

A Labrador foster parent and head of a group working to better the Labrador foster care system is stressing the importance of keeping Indigenous children with Indigenous parents in their Indigenous communities.

After a year of negotiations, the postal union has given Canada Post a 72-hour strike notice. At a solidarity rally in St. John's last week, local president Craig Dyer says a strike could mean parcels — including Christmas presents — won't make it to rural communities.

CBC Newfoundland and Labrador would love to hear your suggestions of folks and organizations who are there when you need them — and all the other times, too.

Nurses' union president Yvette Coffey says more must be done to ensure young nurses stay in the province. Newfoundland and Labrador Health Services says work is underway to match students with job openings.

A candidate for the Nova Scotia NDP has apologized and is no longer running for the party in the provincial election after her comments on Israel and the Holocaust drew concern from the Jewish organizations. 

Kate MacEachern is a Canadian veteran from Ballantynes Cove, N.S., but her service years are far from over. She has spent about two years living in Ukraine, delivering humanitarian aid to communities across the country.

Some Nova Scotia municipal leaders are defending a funding stream the federal Conservatives say they will cut if elected, calling it a "game changer."

The new mayor and council are planning big changes for the Cape Breton Regional Municipality, and one of those is at the top of the staff organizational chart now that chief administrative officer Marie Walsh is set to retire.

The union representing dockworkers in Montreal says Canada's labour minister forcing its members back to work at ports in Montreal and Quebec City marks a "dark day for workers' rights."

The Drosophila embryonic central nervous system has been used for decades as a model for understanding the genetic regulation of axon guidance and other aspects of neural development. Foundational studies using antibody staining to examine the embryonic ventral nerve cord in wild-type and mutant animals led to the discovery of evolutionarily conserved genes that regulate fundamental aspects of axon guidance, including midline crossing of axons. The development of the regular, segmentally repeating structure of axon pathways in the ventral nerve cord can illustrate basic principles of axon guidance to beginning students and can also be used by expert researchers to characterize new mutants, detect genetic interactions between known genes, and precisely quantify variations in gene function in engineered mutant lines. Here, we describe a protocol for collecting and fixing Drosophila embryos and visualizing axon pathways in the embryonic ventral nerve cord using immunofluorescence or immunohistochemical staining methods. As embryogenesis in Drosophila takes ~24 h to complete, a 1-d collection yields embryos representing all stages of development from newly fertilized through ready-to-hatch larvae, allowing investigation of multiple developmental events within a single batch of collected embryos. The methods described in this protocol should be accessible to introductory laboratory courses as well as seasoned investigators in established research laboratories.

Mosquitoes take blood meals from a diverse range of host animals and their host associations vary by species. Characterizing these associations is an important element of the transmission dynamics of mosquito-vectored pathogens. To characterize mosquito host associations, various molecular techniques have been developed, which are collectively referred to as blood meal analysis. DNA barcoding has diverse biological applications and is well-suited to mosquito blood meal analysis. The standard DNA barcoding marker for animals is a 5' fragment of the cytochrome c oxidase I (COI) gene. A major advantage of this marker is its taxonomic coverage in DNA sequence reference databases, making it feasible to identify a wider range of mosquito host species than with any other gene. However, the COI gene contains high sequence variation at potential priming sites between vertebrate orders. Coupled with the need for primer sequences to be mismatched with mosquito priming sites so that annealing to mosquito DNA is inhibited, it can be difficult to design primers suitable for blood meal analysis applications. Several primers are available that perform well in mosquito blood meal analysis, annealing to priming sites for most vertebrate host taxa, but not to those of mosquitoes. Because priming site sequence variation among vertebrate taxa can cause amplification to fail, a hierarchical approach to DNA barcoding-based blood meal analysis can be applied. In such an approach, no single primer set is expected to be effective for 100% of potential host species. If amplification fails in the initial reaction, a subsequent reaction is attempted with primers that anneal to different priming sites, and so on, until amplification is successful.

Transposon-mediated transgenesis has revolutionized both basic and applied studies of mosquito vectors of disease. Currently, techniques such as enhancer traps and transposon tagging, which rely on remobilizable insertional mutagenesis, are only possible with transposon-based vector systems. Here, we provide general descriptions of methods and applications of transposon-based mosquito transgenesis. The exact procedures must be adapted to each mosquito species and comparisons of some differences among different mosquito species are outlined. A number of excellent publications showing detailed and specific protocols and methods are featured and referenced.

After more than a century of searching, scientists have discovered a gene in snails that may control asymmetries inside many animals

A Two-Day Festival in the historic Arts & Industries Building brings community, artists and scholars together for a “Culture Lab”

By raising her son to be curious about the natural world, this mother helped shape the trajectory of the National Museum of Natural History

Tammy Roberts, Home Base's executive director, said before these services launched, there was "no place for youth to go" other than the emergency room or to RCMP cells. 

Stephanie Yuill spent five weeks visiting First World War sites across Europe on a bike she bought from the grocery store. 

Hay River RCMP say they believe two weekend incidents, including one in which a person was shot, are linked to drugs and organized crime.

A man who fled from police, drove onto a walking trail, triggered a shelter-in-place advisory for the Chateau Nova hotel in Yellowknife and subsequently broke into a home was on bail at the time and under house arrest, police say.

The bronze wreath immortalized the moment when the members of the Honor Guard removed their hats and placed them on the president's grave during his burial

A new film revisits the 90 minutes before the first episode of "Saturday Night Live" premiered on NBC on October 11, 1975

A Romare Bearden print served as a starting point for the American playwright's 1987 drama, which follows a Black family's struggle to decide the fate of an ancestral heirloom

The University of Regina Rams knock off their provincial rivals, the University of Saskatchewan Huskies to win their second ever Hardy Cup championship. An emotional Rams head coach, Mark McConkey talks about how his team was able to overcome a rough regular season and win the title.

Inflation, an increase to the debt limit, and a series of mega-projects have been focuses of the municipal election in Regina.

The apartment once occupied by the author of Les Miserables is now a museum dedicated to his life and to 19th century Paris

Buenos Aires, Argentina :: Miembros de la comunidad japonesa encuentran amigos en un barco de visita y escuchan el evangelio en su lengua materna.

An OM worker from Latin America uses his carpentry skills to disciple young men in their faith and give them better employment opportunities for the future.

From deep bass notes echoing through the speaker system, to the countries welcome video, to moments of voices lifted up in praise, the opening session of TeenStreet 2019 made a powerful impact on the participants.