The parasite carries potentially lethal pathogens in Asia as well as Australia and New Zealand. Now it's in North America. We ask tick specialists to weigh in.
Denmark's Social Democrats made a strong showing in this week's elections — but voter support came in part because of the increasingly hard line the party has taken on immigration.
Psychologist Per Espen Stoknes explains the inner defenses that block most people from recognizing the urgency of climate change. He asks, what is a better way to think and talk about this crisis?
In 1988, the Montreal Protocol was the first step in a long process to save the ozone layer. Sean Davis explains the impact of the agreement, and the lessons we can apply to the crisis we face today.
To slow climate change, we need to lower emissions and remove carbon from the atmosphere. Chemical engineer Jennifer Wilcox says the technology is there, and we need to scale it.
In 2018, teenager Greta Thunberg began protesting to demand action on climate change. She has inspired protests worldwide. Greta says it's time to panic: we're running out of time to save our planet.
Bruce Friedrich shows how plant and cell-based products could soon transform the way we eat ... and reduce the global meat industry's impact on the planet.