Hanne Strager

In the 1930s, the pioneering Danish scientist Inge Lehmann (1888-1993) made a groundbreaking discovery about the nature of Earth. Analyzing data from earthquakes, she determined that the heart of the planet is a solid inner core. Her discovery overturned the widely accepted theory of the core being fluid, but she trusted her calculations: "If I am right, and I know...

A marvellously illustrated look at wild orcas.Of the world's iconic predatory species, orcas are among the most fearsome. Their awesome physical power combined with their cooperative hunting skills and ability to problem-solve make them uniquely efficient killers. Yet orcas also celebrate births, grieve losses, and maintain lifelong family bonds. This stunningly illustrated book draws on five decades of field research...