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Many people think of Antarctica as desolate. But wildlife filmmaker Ariel Waldman says the coldest continent is brimming with invisible life — that can only be seen through microscopes.

Each day, we breathe about 22,000 times--and all that time we smell. Scent historian Caro Verbeek recreates scents of the past. She says, just like music and art, smell is a part of our heritage.

Sea level rise will displace millions by 2100 — and the Louisiana bayous, where Colette Pichon Battle lives, may disappear entirely. She describes how we can avert the worst when disaster strikes.

Marine biologist Marah Hardt is fascinated with the mating habits of marine life. If we want to save the oceans, she says we have to understand the weird and whimsical sex that helps populate it.

Eli Pariser has an optimistic vision for our digital public spaces. He says that by structuring them like real-life parks, libraries, and town halls, we can create more welcoming, safe places online.

Marriage takes a lot of work. And part of preventing eventual heartache, says law professor Jeannie Suk Gersen, is seeing marriage and partnership through the lens of divorce.

For generations, Indigenous people have used slow but sophisticated technology to build elaborate structures. Architect Julia Watson says their designs can guide our response to the climate crisis.

Back in 2015, Chicago's Englewood neighborhood was lined with blocks of houses tagged for demolition. Before they were torn down, artist Amanda Williams used color to bring them back to life.

Social entrepreneur Jasmine Crowe has one mission: feed more, waste less. Her company Goodr is tackling food waste and getting food to those who need it most.

At age 55, Elizabeth White lost her job--and her entire safety net--in the 2008 recession. Her story isn't uncommon. White says, now more older adults are pushed out of their jobs and into poverty.