Opinions about remote work are plentiful and conflicting -- but what does the research say? Organizational design expert Mark Mortensen identifies the challenges of navigating the hybrid work debate and shares three conversation topics every workplace should explore as people change the way they show up on the job.

What if we could hear nature's ultrasonic communication -- and talk back? From a bat's shrill speech to a peacock's infrasound mating call, conservation technology researcher Karen Bakker takes us through a sound bath of animal noises that are far outside humanity's range of hearing, demonstrating how artificial intelligence has translated the incredible complexity of nature's soundtrack. She asks us to consider the moral weight of such transformative technology and explores the futuristic opportunities presented for conservation, interspecies communication and more.

If we're going to solve the climate crisis, we need to talk about supply chains, says biodiversity champion and 2023 Audacious Project grantee Nicole Rycroft. Her organization, Canopy, partners with key industry leaders to overhaul their base materials in favor of more sustainable alternatives. Learn more about how they're shifting production of everything from T-shirts to the Harry Potter book series out of the world's ancient and endangered forests -- and how solutions for every sector are closer than we think.

How can cities become resilient to the shocks of climate change? As a leading force behind Detroit's ongoing revitalization, Anika Goss spends a lot of time thinking about this question. Connecting the city's industrial past to its sustainable future, she explores the link between climate vulnerability and economic inequity, offering a vision for responding to both challenges at once.

What's it like keeping the lights on during war? Ukrainian energy executive Maxim Timchenko shares how his company has diversified Ukraine's power structures to survive Russian attacks, highlighting the resilience of renewable energy. Hear more about Ukraine's present-day challenges, how it's become a testing ground in the global fight against climate change and the transformative path towards sustainable energy independence.

Decision theorist Eliezer Yudkowsky has a simple message: superintelligent AI could probably kill us all. So the question becomes: Is it possible to build powerful artificial minds that are obedient, even benevolent? In a fiery talk, Yudkowsky explores why we need to act immediately to ensure smarter-than-human AI systems don't lead to our extinction.

Lethal drones with facial recognition, armed robots, autonomous fighter jets: we're at the dawn of a new age of AI-powered warfare, says technologist Alexandr Wang. He explores why data will be the secret weapon in this uncharted landscape and emphasizes the need to consider national security when developing new tech -- or potentially face all-out AI warfare.

Education activist and 2023 Audacious Project grantee Angeline Murimirwa knows the power of educating girls, especially in places where they may not have easy access to schooling. But she says that's not enough. In an inspiring talk, she clarifies why a support network around girls -- from the moment they enter the classroom to years after they graduate -- makes a radical difference for their lives in school and beyond. Learn how how her nonprofit CAMFED is building a sisterhood to do just that. (This ambitious idea is a part of the Audacious Project, TED's initiative to inspire and fund global change.)

As a death doula, or someone who supports dying people and their loved ones, Alua Arthur spends a lot of time thinking about the end of life. In a profound talk that examines our brief, perfectly human time on this planet, she asks us to look at our lives through the lens of our deaths in seeking to answer the question: "What must I do to be at peace with myself so that I may live presently and die gracefully?"

We tend to think of evolution as a slow, gradual process playing out over millions of years. But evolutionary biologist Shane Campbell-Staton says nature is now changing at breakneck speed to keep up with the world humanity has built. From tuskless elephants who escape poachers to wolves living in the radioactive Chernobyl Exclusion Zone, Campbell-Staton unpacks how life is rapidly adapting in surprising ways -- and asks us to rethink how we can protect the planet's biodiversity.