Singing sexy back: How sparrows adapted to COVID-19 shutdown

As the streets of San Francisco emptied out in the first months of the pandemic, the city's male birds began singing more softly and improving their vocal range, making them "sexier" to females, according to a new study published ...

Western wildfire smoke causes East Coast haze, vivid sunsets

The smoke from dozens of wildfires in the western United States is stretching clear across the country—and even pushing into Mexico, Canada and Europe. While the dangerous plumes are forcing people inside along the West ...

Utah's arches continue to whisper their secrets

Two new studies from University of Utah researchers show what can be learned from a short seismic checkup of natural rock arches and how erosion sculpts some arches—like the iconic Delicate Arch—into shapes that lend ...

Abell 2384: Bending the bridge between two galaxy clusters

Several hundred million years ago, two galaxy clusters collided and then passed through each other. This mighty event released a flood of hot gas from each galaxy cluster that formed an unusual bridge between the two objects. ...

New book debunks myths about who causes crime and why

Forty years ago, Craig Haney was a young professor of psychology at UC Santa Cruz when a question about the real causes of crime began to form in his mind: What if most violent criminal behavior is rooted in early childhood ...

Tiny 'bridges' help particles stick together

It happens outside your window every time it rains: The soil gets wet and may form sticky mud. Then it dries. Later it might rain again. Each wetting and rewetting affects the structure and stability of the soil. These changes ...

Experts explain the effect of climate change on infrastructure

From fires in the Amazon and in Australia, to flash flooding in Europe, right across the globe we are witnessing the impact of climate change on the environment. But how does a changing climate affect key infrastructure? ...

Subtle changes, big effects

"Does the flap of a butterfly's wings in Brazil set off a tornado in Texas?," Edward Lorenz, once famously wondered at the 139th meeting of the American Association for the Advancement of Science. Scientists have recently ...

A more sustainable material to reinforce concrete structures

The next generation of ultra high-performance fiber-reinforced concrete (UHPFRC) has just been created at EPFL. The new material will be used to strengthen and to extend the life span of bridges and other structures—both ...

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Bridge

A bridge is a structure built to span a valley, road, railroad track, river, body of water, or any other physical obstacle, for the purpose of providing passage over the obstacle. Designs of bridges will vary depending on the function of the bridge and the nature of the terrain where the bridge is to be constructed.

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