After recovering from pneumonia for the third time, journalist James Nestor took decisive action to improve his lungs. He questioned why so many humans - and only humans - have to contend with stuffy noses, snoring, asthma, allergies, sinusitis and sleep apnoea, to name but a few. James hears remarkable stories of others who have changed their lives through the power of breath. His deep dive into the unconscious and oft-ignored act of human respiration offers us all a way to breathe easier.

Justin Rowlatt discovers how phosphorus may have held evolution back for a billion years. How plants first colonised the land - precipitating an ice age in the process. And why volcanoes have both rescued and almost wiped out life on the planet, thanks to the carbon dioxide they emit. Anjali Goswami of the Natural History Museum takes Justin on a tour of the big five mass extinction events in the fossil record over the last half billion years.

It began in March of 1987, when the playwright Larry Kramer gave a speech at the Lesbian and Gay Community Services Center in New York’s West Village, telling half the room to stand up. He bluntly informed those in attendance, that many people would be dead from Aids in just a few years, if they didn’t fight back. The US government’s response to the HIV-Aids crisis had been slow, with President Reagan reticent to offend the conservative morals of the Christian Coalition who helped secure his election. In response, the Aids Coalition to Unleash Power - Act Up - took to the streets to demand politicians and public health agencies do more.

Forgiving someone who has hurt us badly can seem impossible. Bearing a grudge can feel like carrying a bag or rocks. Can we learn to move on and forgive?Author of Universal Human, Gary Zukav, offers insights to Joey from Lebanon, now living in Germany, as he struggles to forgive his brother for creating problems in his marriage and seeks to heal the rift it has caused in his family.

World leaders, scientists and activists are preparing for next month’s UN climate change summit in Scotland. These talks have been taking place for decades - but you sense the world is watching like never before, as awareness increases around how the planet is changing. In 1992, a 12-year-old called Severn Cullis-Suzuki from Canada gave a rousing speech and appeal for action at the Earth Summit in Rio. Severn and her father remain long-term environmental activists and host Nuala McGovern brings them together in conversation to hear their thoughts on whether Severn’s speech would be any different today.