Cambridge Physicists Find Wormhole Proof
Physicists at the University of Cambridge have found a theoretical foundation for the existence of wormholes, which are tubes that connect two different points in space-time.
What's the Latest?
Physicists at the University of Cambridge have found a theoretical foundation for the existence of wormholes, which are tubes that connect two different points in space-time. If a piece of information or physical object could pass through the wormhole, it could open the door to time travel or instant communication across enormous distances. "But there's a problem: Einstein's wormholes are notoriously unstable, and they don't stay open long enough for anything to get through." In 1988, physicists reached the conclusion that a kind of negative energy called Casimir energy could keep wormholes open.
What's the Big Idea?
The theoretical solution reached at Cambridge has to do with the effects of quantum energy, which tells us that even vacuums are teaming with waves of energy. If you imagine two metal plates in a vacuum, some waves of energy would be too big to fit between the plates, meaning that the space-time between the plates would have negative energy. "[U]nder the right circumstances, could the tube-like shape of the wormhole itself generate Casimir energy? Calculations show that if the wormhole's throat is orders of magnitude longer then the width of its mouth, it does indeed create Casimir energy at its centre."
What can 3D printing do for medicine? The "sky is the limit," says Northwell Health researcher Dr. Todd Goldstein.
- Medical professionals are currently using 3D printers to create prosthetics and patient-specific organ models that doctors can use to prepare for surgery.
- Eventually, scientists hope to print patient-specific organs that can be transplanted safely into the human body.
- Northwell Health, New York State's largest health care provider, is pioneering 3D printing in medicine in three key ways.
Torn between absolutism on the left and the right, classical liberalism—with its core values of compassion and incremental progress whereby the once-radical becomes the mainstream—is in need of a good defense. And Adam Gopnik is its lawyer.
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Irish president believes students need philosophy.
- President of Ireland Michael D. Higgins calls for students to be thought of as more than tools made to be useful.
- Higgins believes that philosophy and history should be a basic requirement forming a core education.
- The Irish Young Philosopher Awards is one such event that is celebrating this discipline among the youth.
The lost practice of face-to-face communication has made the world a more extreme place.
- The world was saner when we spoke face-to-face, argues John Cameron Mitchell. Not looking someone in the eye when you talk to them raises the potential for miscommunication and conflict.
- Social media has been an incredible force for activism and human rights, but it's also negatively affected our relationship with the media. We are now bombarded 24/7 with news that either drives us to anger or apathy.
- Sitting behind a screen makes polarization worse, and polarization is fertile ground for conspiracy theories and fascism, which Cameron describes as irrationally blaming someone else for your problems.
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