This tumblr's for all the great men and women of science for whom we owe our current understanding of the natural world; their achievements, their failures, and even their quirks, we celebrate them all.
For Science. For Inquiry. For Humanity.
Future was a 1970s magazine that mixed science fact, speculation and fiction and often featured amazing artwork commissioned just for the magazine. But it lost its way and folded in 1981.
An orrery is a mechanical device that illustrates the relative positions and motions of the planets and moons in the Solar System in a heliocentric model. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to the Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.
Animation showing the Crab Supernova explosion and its remant.
June 18, 1983: Sally Ride Becomes First American Woman in Space
On this day in 1983, at the age of 32, astronaut Sally Ride became the first American woman in space aboard the space shuttle Challenger. Her voyage came 20 years after Valentina Tereshkova became the first woman in space. After the voyage, Sally Ride received many honors for her contributions to the field of science and space exploration.
In May 2012, Sally Ride became the recipient of the Presidential Medal of Freedom, the highest civilian award in the United States.
On July 23, 2012, Sally Ride died at the age of 61 after a 17-month battle with pancreatic cancer.
Visit PBS NewsHour to learn more about Sally Ride.
Photo: Courtesy of NASA
Embryonic Bat Skeleton
1st image: Image (still needs credit)
2nd image: Scott Weatherbee, Memorial Sloan Kettering Cancer Center
This all leads us into talking about the observed action potential. If you put in some electrodes to measure voltage across the membrane, this is what you would see. In phase 1, “leak” channels are open and the Na-K pump is maintaining the negative potential.
Phase 2 is when the ligand-gated Na+ channels have opened causing the voltage-gated Na+ channels to open and sodium to rush into the cell. The ball closes the pore and phase 3 is then caused by the slow to open voltage-gated K+ channels opening and K+ leaving the neuron.
Phase 4 is caused by the slow K+ VG channels being slow to close. Too much K+ has left! Resting state (labeled phase 1 here) is restored when those channels have closed and the Na-K pump sets to work!
“because when i look up at the universe, i know i’m small. but i’m also big. i’m big because i’m connected to the universe, and the universe is connected to me”
When he wasn’t envisioning space cannons and figuring out what holds the universe together, Isaac Newton applied his considerable intellect to other problems — possibly including ways to keep the cat from scratching on the door.
Born the son of an uneducated farmer, Newton died a true polymath — a celebrated master of astronomy, chemistry, mathematics, physics, and theology. His many inventions, discoveries, and harebrained notions provide a glimpse into a legendary mind. Here are our 10 favorites.
“As a small child in England, I had this dream of going to Africa. We didn’t have any money and I was a girl, so everyone except my mother laughed at it.”