Putting Einstein to the Test
Physicists have developed an experiment involving super cold matter and an empty elevator shaft that will test one concept crucial to Einstein's Theory of General Relativity.
Physicists have developed an experiment involving super cold matter and an empty elevator shaft that will test one concept crucial to Einstein's Theory of General Relativity. The experiment may shed light onto the tension between quantum physics and Einstein's relativity. "Einstein's 'equivalence principle', which underpins general relativity, says that if you stand in a falling elevator, your acceleration should effectively cancel out the pull of gravity, leaving you unable to determine whether you are in free fall or whether there is simply no gravity present at all," says the New Scientist. "Determining whether quantum systems are also subject to this equivalence principle might help pin down why quantum theory has so far resisted any merger with general relativity – a mystery that haunts physics."
What makes a life worth living as you grow older?
- Dr. Ezekiel Emanuel revisits his essay on wanting to die at 75 years old.
- The doctor believes that an old life filled with disability and lessened activity isn't worth living.
- Activists believe his argument stinks of ageism, while advances in biohacking could render his point moot.
The Amazon Rainforest is often called "The Planet's Lungs."
- For weeks, fires have been burning in the Amazon rainforest in Brazil, likely started by farmers and ranchers.
- Brazil's president, Jair Bolsonaro, has blamed NGOs for starting the flames, offering no evidence to support the claim.
- There are small steps you can take to help curb deforestation in the Amazon rainforest, which produces about 20 percent of the world's oxygen.
Emojis might contain more emotional information than meets the eye.
- A new study shows that people who frequently used emojis in text messages with potential dates engaged in more sexual activity and had more contact with those dates.
- However, the study only shows an association; it didn't establish causality.
- The authors suggest that emojis might help to convey nuanced emotional information that's lacking in strictly text-based messaging.