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Albert Einstein was the first to discuss the fabric of space, and according to his theorems, the curvature of it. We have been discussing the possibility of gravitational waves ever since.

Creative director at Apple for 12 years, and the man responsible for introducing the lowercase-i into Apple’s product line, Ken Segall discusses the present and future of Apple computers.

The story of O.J. Simpson continues to explore American culture in a unique way. Simpson, who always distanced himself from his blackness, became a national referendum on race relations.

We have typically defined addiction as needing a substance to function normally, but this ignores crucial psychological qualities of addiction. A new and better definition has arrived, says Maia Szalavitz.

Everything we thought we knew about female sexual desire is being overturned. Following from experiments, what we think turns us on and what actually excites us are two different things.

“What we perceive as color — what we perceive as light — corresponds to a very narrow band of frequencies, out of an infinite continuum,” says Nobel Laureate Frank Wilczek.

Responding to the shooting of a gorilla at the Cincinnati Zoo, Bill Nye says the treatment of animals in zoos is plainly unethical. Yet zoos do have a role in maintaining the health of ecosystems.

Princeton historian Sean Wilentz says that from a historical perspective the rise of Donald Trump signals the end of the Republican Party as we know it — and a worrisome new politics.

Academy Award-winning documentarian Charles Ferguson says there is a good reason why authoritarian oligarchies are the worst nations at dealing with climate change.

Echoing the English psychoanalyst Donald Winnicott, Scott Barry Kaufman explains why solitude is considered one of the greatest markers of psychological health.

The problem with work-life balance is that it traps us in a career or job-oriented mindset, working for either a paycheck or purely to climb the ladder. Find purpose instead, says Dan Pontefract.

Betrayal is part of giving trust, says JetBlue Chairman Joel Peterson. So the odds are you will be betrayed at some point in time. Still, recovery and healing are possible.

Free speech is paramount, but how you use your speech defines you as a person. When our politicians stop demanding the moral high ground, we are in a very dangerous place, says Hawke.

Immortal animals would have a better chance of longterm survival, or to survive as a species, so why do animals grow old and die? Bill Nye the Science Guy explains a hard fact of evolution.

There is more global immigration than ever before because we live in a dispersed, and therefore connected, world. Great societies have always depended on immigrants, and today is no exception.

Are to-do lists about feeling a sense of accomplishment or actually getting things done? The typical way of writing lists can result in feeling good about yourself at the expense of productivity.

The ability of particles to coordinate their behavior across distances may seem to violate the speed-of-light constant, but is a signal really being sent between them? Or does Einstein still reign?

Poverty is the defining issue of our time, says Tavis Smiley. And while we have recognized the problem of income inequality, economic mobility is not yet part of our national conversation.

People naturally mimic each other’s body language, so when you notice it happening to you, it may be a sign that you are personally or professionally compatible with the other person.

Many diseases supposedly linked to steroid use in adults simply do not occur, says Steven Kotler. Steroids are, however, great at combating HIV/AIDS and as an anti-aging too.

We have an ethical imperative to deploy artificially intelligent robots on the battlefield, says Jerry Kaplan. They keep soldiers off the battlefield and discriminate between civilian and military life.

What the difference in brain structure between liberals and conservatives? And where do our political convictions come from: rational deliberation, or biological determinism?

Taking individual steps to affect the course of climate change is valuable, but collective action is more essential. To get there, we must talk about climate change, says Bill Nye the Science Guy.

Geobiologist Hope Jahren: studying the natural world of plants helps us transcend our human form, find joy and meaning in life, and feel more at home in this world we all journey through.

What’s the best advice novelist Joshua Cohen has for aspiring writers? It’s not to kill your darlings but kill your distractions. And get in touch with your deepest animal impulses.

Creators of artificial intelligence measure how well machines can imitate human qualities like empathy, listening, affirmation, and love. Don’t reciprocate, says Sherry Turkle.

It is one thing not to discriminate against people, says Salman Rushdie, i.e. peaceful practitioners of Islam, but to foreclose an open debate over the merits of religion is a mistake.

Modern “theories” suggesting the Earth is flat are ignorant of basic experiential data, historical scientific findings, and how technologies like smartphone functions, says Bill Nye the Science Guy.

The road to eugenics was paved with good intentions, says Siddhartha Mukherjee. So what questions are essential to ask now that we can change human DNA through gene editing technology?

We assume that getting a “yes” from the other side is the goal of any negotiation, but former lead FBI negotiator Chris Voss says knowing how to get a “no” is actually more important.