In October, the legendary naturalist Jane Goodall died at age 91. During her life, Goodall not only saw a lot of change in the world, but made a lot of it too.

Her field work with chimpanzees transformed how both science and the general public view our fellow primates. In later years, as an activist and conservationist, she inspired countless young people to follow her lead and change the world. And despite political leaders recently seeming to prioritize the economy over the environment, Goodall always found reasons to remain hopeful.

In September, Piya Chattopadhyay spoke with Goodall about her journey and her desire to keep sparking positive change.

• Host Piya Chattopadhyay speaks with The New York Times' Stephanie Nolen, Council on Foreign Relations fellow Ebenezer Obadare and international affairs expert Suparna Chaudhry about the consequences of recent cuts to foreign aid

• We revisit our conversation with the late conservation icon Jane Goodall about keeping hope for our planet alive

• Chef and cookbook author Samin Nosrat shares how grief reframed her relationship with food

Did you replace your chocolate orange with Dubai chocolate this year? Spike your eggnog with matcha? According to Ruby Tandoh, algorithms and search engine optimization are the hidden ingredients in the food we crave. The baker and writer joins Piya Chattopadhyay to explain how frothy adjectives came to dominate recipes, why we can't get enough of the colour green, and what today's top trends say about our global appetite.