Barto

In 2018, lumps of frozen soil, collected from the bottom of the world's first deep ice core and lost for decades, reappeared in Denmark. When geologist Paul Bierman and his team first melted a piece of this unique material, they were shocked to find perfectly preserved leaves, twigs, and moss. That observation led them to a startling discovery: Greenland's ice sheet had melted naturally before, about 400,000 years ago.

Women can be heroes. When twenty-year-old nursing student Frances “Frankie” McGrath hears these words, it is a revelation. Raised in the sun-drenched, idyllic world of Southern California and sheltered by her conservative parents, she has always prided herself on doing the right thing. But in 1965, the world is changing, and she suddenly dares to imagine a different future for herself. When her brother ships out to serve in Vietnam, she joins the Army Nurse Corps and follows his path.