What had Wren learned last week when she was listening to NPR in Aunt Bex's studio?

When Wren was listening to NPR in Aunt Bex's studio last week, she had learned that scientists had for the first time watched two neutron stars collide over 100 million light-years away. It was called a kilonova, and it was such a huge crash that gravitation waves were created, and light was released. The man who was being interviewed said that it took a collision of that magnitude to create the particles that made up gold and platinum. Wren knew her father would love to know that information and that precious materials like gold and platinum were made from the "clashes of titans" (247).