12 de julio de 2023

A Tale of Two Perspectives

While I was crouching and taking pictures along a trail in the Tatras mountains of Slovakia, a middle-aged woman caught my attention as she walked by. Intrigued, she curiously inquired about the object of my fascination. I gestured towards a magnificent Chrysosplenium alternifolium and proudly declared, "Behold, this splendid specimen is a Chrysosplenium." (Well, something more along the lines of, "there's an interesting plant; a Chrysosplenium"). As my words escaped my lips, I witnessed a sudden shift in her demeanour—an abrupt vanishing of enthusiasm, replaced by an unmistakable disappointment. With a tinge of regret, she uttered, "Oh, just a plant."

Publicado el 12 de julio de 2023 09:28 por danielcahen danielcahen | 1 observación | 3 comentarios | Deja un comentario

20 de septiembre de 2022

Heroes that deserve more recognition

How much thought have you given lately to Karl Landsteiner? Karl who? He only saved a billion lives by his discovery of blood groups. Or how about these other heroes?

Abel Wolman (1892–1982) and Linn Enslow (1891–1957)
chlorination of water
177 million lives saved

William Foege (1936– )
smallpox eradication strategy
131 million lives saved

Maurice Hilleman (1919–2005)
eight vaccines
129 million lives saved

John Enders (1897–1985)
measles vaccine
120 million lives saved

Howard Florey (1898–1968)
82 million lives saved

Gaston Ramon (1886–1963)
diphtheria and tetanus vaccines
60 million lives saved

David Nalin (1941– )
oral rehydration therapy
54 million lives saved

Paul Ehrlich (1854–1915)
diphtheria and tetanus antitoxins
42 million lives saved

Andreas Grüntzig (1939–1985)
15 million lives saved

Grace Eldering (1900–1988) and Pearl Kendrick (1890–1980)
whooping cough vaccine
14 million lives saved

Gertrude Elion (1918–1999)
rational drug design
5 million lives saved

From Steven Pinker in "Enlightenment Now"

Publicado el 20 de septiembre de 2022 16:00 por danielcahen danielcahen | 1 comentario | Deja un comentario

23 de agosto de 2022

Scientific discovery and playing with toys

Physics, chemistry, and biology discoveries were almost always dependent on the technology available to peer into the workings of the natural world. There would be no cellular biology or molecular biology without microscopes or electron microscopes, no astronomy or classical mechanics without telescopes, no modern particle physics without particle accelerators, no analytical chemistry without spectrometers, and so on. Making scientific discoveries is frequently a matter of having access to the newest and most powerful toys.

Publicado el 23 de agosto de 2022 09:53 por danielcahen danielcahen | 0 comentarios | Deja un comentario

13 de mayo de 2022

Inaccurate coordinates

My camera's GPS is unreliable; coordinates for my observations are often about 20-30 meters off.

Publicado el 13 de mayo de 2022 15:51 por danielcahen danielcahen | 1 comentario | Deja un comentario