"A physical delineation of nature terminates at the point where the sphere of intellect begins, and a new world of mind is opened to our view. It marks the limit, but does not pass it."

Kosmos

Alexander von Humboldt was born #OTD in 1769. His quantitative work on botanical geography laid the foundation for the field of biogeography, while his advocacy of long-term systematic geophysical measurement pioneered modern geomagnetic & meteorological monitoring.

https://www.gutenberg.org/ebooks/author/1995

#science