For 6,000 years, humans have been making things from metal because it's strong and tough; a lot of energy is required to damage it. The flip side of this property is that a lot of energy is required to repair that damage. ...
Materials Science
Aug 28, 2019
0
4421
The pistons in your car engine rub up against their cylinder walls thousands of times a minute; without lubrication in the form of motor oil, they and other parts of the engine would quickly wear away, causing engine failure. ...
Materials Science
Mar 13, 2015
1
522
(PhysOrg.com) -- Researchers at the University of Pennsylvania report that a new test for measuring the ability of gravity to bend light seen from distant stars around large objects like black holes may offer proof of the ...
General Physics
Nov 18, 2010
12
0
A team of University of Pennsylvania physicists has shown how to disrupt the "coffee ring effect" — the ring-shaped stain of particles leftover after coffee drops evaporate — by changing the particle shape. The ...
General Physics
Aug 17, 2011
1
2
On frigid days, water vapor in the air can transform directly into solid ice, depositing a thin layer on surfaces such as a windowpane or car windshield. Though commonplace, this process is one that has kept physicists and ...
Materials Science
Jan 2, 2020
0
265
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the ...
Nanomaterials
Nov 6, 2018
0
592
They know their names. We can read their facial expressions, sort of. And some of them really like having us around. These are among the purported findings of recent scientific studies aimed at deciphering the behavior of ...
Plants & Animals
Feb 20, 2020
0
370
Sturgeon, a long-lived, bottom-dwelling fish, are often described as "living fossils," owing to the fact that their form has remained relatively constant, despite hundreds of millions of years of evolution.
Plants & Animals
Jun 22, 2020
1
4509
Are people who earn more money happier in daily life? Though it seems like a straightforward question, research had previously returned contradictory findings, leaving uncertainty about its answer.
Social Sciences
Mar 6, 2023
0
249
Think evolution is a slow, gradual process? Tell that to fruit flies. In a new report in Science, researchers from the University of Pennsylvania used a controlled field experiment to show that flies rapidly adapted to shifting ...
Evolution
Mar 17, 2022
1
337
