Science & Technology

Peacock feathers under bright light

Engineers manipulate color on the nanoscale, making it disappear

A new system of nanoscale semiconductor strips uses structural color interactions to eliminate the strips’ intrinsic color entirely, with implications for holographic displays and optical sensors, or new types of microlasers and detectors.

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In the News


The New York Times

Businesses aim to pull greenhouse gases from the air. It’s a gamble

Jennifer Wilcox of the School of Engineering and Applied Science spoke about companies pledging to eliminate their carbon emissions within decades. “Carbon removal shouldn’t be seen as a get-out-of-jail-free card,” she said. “It has a role to play, particularly for sectors that are very difficult to decarbonize, but it shouldn’t be an excuse for everyone to keep emitting greenhouse gases indefinitely.”

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NPR

Can Biden’s climate plan spark cooperation in Pa.? Some see possible common ground in jobs, infrastructure

Oscar Serpell of the Kleinman Center on Energy Policy in Stuart Weitzman School of Design spoke about President-elect Joseph Biden’s plan to transition the country to renewable energy. “The business case has never been stronger, and I think it will continue to get stronger every single year,” Serpell said.

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NPR

Facebook keeps data secret, letting conservative bias claims persist

PIK Professor Duncan Watts is working with Facebook to analyze its content for bias. "Mostly it's mainstream content," he said. "If anything, there is a bias in favor of conservative content."

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NBC News

Your dog may love you, but doesn't love the sight of your face, study finds

Carlo Siracusa of the School of Veterinary Medicine commented on a study that found dogs were more stimulated by seeing other dogs than people. “Mother Nature will not invest in something that is not relevant to survival, either in dog-to-dog or even wolf-to-wolf interactions,” he said. “They use other ways of communicating such as ear position—which can be seen from the front and from behind. The ear position will tell about the mood of the dog. We humans don’t move our ears.”

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CBS Philadelphia

University of Pennsylvania program training dogs to sniff out spotted lanternfly eggs

Jennifer Essler, a postdoc in the School of Veterinary Medicine, spoke about a new program that trains dogs to detect the presence of spotted lanternfly eggs. “For the dogs, it’s a game, it’s like anything else. They don’t know that they are saving the planet in any way,” she said.

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The Washington Post

Drone maker hurt by US-China rift, opening door to US rivals

Dean Vijay Kumar of the School of Engineering and Applied Science spoke about the challenges of using drones for commercial purposes and about American perceptions of DJI, a China-based drone manufacturer.

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The Hill

Pandemic exposes broadband divide

Christopher Yoo of the Law School spoke about the importance of expanding broadband infrastructure in the U.S. “Investing in infrastructure would be a terrific way to support the economy. It not only spends money but also lays the foundation for future growth and future jobs,” he said.

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CNN

What you need to know about coronavirus on Wednesday, September 2

Kenneth Foster of the School of Engineering and Applied Science debunked conspiracy theories that link 5G networks and radio frequencies to the spread of COVID-19. "There's nothing different in terms of exposure," he said.

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BBC News

Elon Musk to show off working brain-hacking device

Ari Benjamin, a doctoral student in the School of Engineering and Applied Science, said the biggest stumbling block for brain-to-machine interface technology is the complexity of the human brain. "Once they have the recordings, Neuralink will need to decode them and will someday hit the barrier that is our lack of basic understanding of how the brain works, no matter how many neurons they record from,” he said. "Decoding goals and movement plans is hard when you don't understand the neural code in which those things are communicated."

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Gizmodo

Does your cat actually hate you?

Carlo Siracusa of the School of Veterinary Medicine spoke about how cats interact with their owners. “Humans are very physical in their relationships—they want to hold their cat, hug their cat, etc. This can be terrible for any animal that doesn’t enjoy your presence, but it’s even worse for cats, because the way in which cats express their preferences is through proximity,” he said.

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