Happy Birthday to Danish seismologist and geophysicst Inge Lehmann! From her wikipedia page:
Inge Lehmann ForMemRS was a Danish seismologist and geophysicist who postulated the Earth’s inner core. In 1936, she theorized from existing seismic data the existence of an inner core with physical properties distinct from the outer core’s and that Earth’s core is not a single molten sphere. Seismologists, who had not been able to propose a workable hypothesis for the observation that the P-wave created by earthquakes slowed down when it reached certain areas of the inner Earth, quickly accepted her conclusion.
Google’s latest doodle celebrates the birthday of Danish seismologist Inge Lehmann, who discovered the existence of an inner core in the Earth.
Coming 127 years after her birth, the doodle shows the Earth split in two with the inner core shining in the centre.
Lehmann, who died aged 104 in 1993, studied earthquakes to find that the Earth had both an inner and outer core, a revelation which redefined how the planet was studied.
“Inge used deduction and evidence to discover something unseeable. Today’s doodle sheds light on her powerful but invisible discovery. Doodler Kevin Laughlin helps us experience the gift Inge illuminated for the world by revealing it as a glowing orb. Not all of his early drafts looked the same, but the Earth’s inner core glowed at the centre of each,” commentary from Google on the artwork said.
Lehmann was educated at a mixed gender school – unusual for the time – and became frustrated in her career at the attitudes towards women in the sciences.
Her nephew Niles Groes has described how she had a filing system in which cardboard cards with information about earthquakes around the world were organised into porridge boxes.
“With her cardboard cards and her oatmeal boxes, Inge registered the velocity of propagation of the earthquakes to all parts of the globe. By means of this information, she deduced new theories of the inner parts of the Earth,” he said.
She was given the highest honour of the American Geophysical Union, the William Bowie medal, in 1971.
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!
Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: Open Hardware is In, New CircuitPython and Pi 5 16GB, and much more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
