... that birds have an in-built air-conditioning system?
Using a ZEISS 3D X-ray microscope, US researchers have discovered that some birds have an in-built air-conditioning system in their beaks. There are tiny structures in their nasal cavities that cool airflow and retain moisture.
... that Charles Darwin thought highly of ZEISS microscopes?
In a letter to Ernst Haeckel, Prorector of the University of Jena, Charles Darwin requested a microscope from Carl Zeiss for his son Francis. And Carl Zeiss actually sent the 4,876th microscope to Darwin on 11 March 1881.