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Reblogged from jtotheizzoe  357 notes
jtotheizzoe:

How do we really know the Earth has a solid core? I mean, we can’t go down there, despite what Jules Verne would lead you to believe.
As I mentioned in my “Structure of the Earth” video this week on It’s Okay To Be Smart, Earth’s tendency to shake and rumble up here on the crust has allowed us to discover a lot about its inner structure.
Earthquakes don’t only send waves along Earth’s surface, they send certain kinds of waves (P-waves and S-waves) through the Earth itself which can even be read by seismic stations on the other side of the planet. These two kinds of waves interact with solids and liquids within the Earth, being refracted and/or blocked by certain liquid and solid phases, resulting in seismic shadow zones halfway around the globe. You can see it clearly in this GIF of a 2002 Denali quake:  

Study enough earthquakes in different places, and you can tell a lot about Earth’s interior.
That’s precisely what Dutch scientist Inge Lehmann did in the early 20th century. I strongly recommend heading over to Meg Rosenburg’s True Anomalies blog to read a very detailed history and explanation of how we discovered Earth’s core.
And if you missed it, here’s last week’s OKTBS video all about why the Earth has layers and how it got that way:

Bonus: You know how they say dogs and cats (and other animals) can sense earthquakes and other natural disasters? Here’s GIF proof, as a dog and cat get the hell outta Dodge right before a quake hits:

jtotheizzoe:

How do we really know the Earth has a solid core? I mean, we can’t go down there, despite what Jules Verne would lead you to believe.

As I mentioned in my “Structure of the Earth” video this week on It’s Okay To Be Smart, Earth’s tendency to shake and rumble up here on the crust has allowed us to discover a lot about its inner structure.

Earthquakes don’t only send waves along Earth’s surface, they send certain kinds of waves (P-waves and S-waves) through the Earth itself which can even be read by seismic stations on the other side of the planet. These two kinds of waves interact with solids and liquids within the Earth, being refracted and/or blocked by certain liquid and solid phases, resulting in seismic shadow zones halfway around the globe. You can see it clearly in this GIF of a 2002 Denali quake:  

Study enough earthquakes in different places, and you can tell a lot about Earth’s interior.

That’s precisely what Dutch scientist Inge Lehmann did in the early 20th century. I strongly recommend heading over to Meg Rosenburg’s True Anomalies blog to read a very detailed history and explanation of how we discovered Earth’s core.

And if you missed it, here’s last week’s OKTBS video all about why the Earth has layers and how it got that way:

Bonus: You know how they say dogs and cats (and other animals) can sense earthquakes and other natural disasters? Here’s GIF proof, as a dog and cat get the hell outta Dodge right before a quake hits:

Reblogged from brandx  117,844 notes

sistahmamaqueen:

bellecosby:

llvnos:

setfabulazerstomaximumcaptain:

pine-cypress:

gynocraticgrrl:

"I think what we need is a colorblind society." Now folks, when you hear somebody say that you know you’re listening to a racist…

- Jane Elliot and Oprah Winfrey discussing racism in 1992 on the Oprah Winfrey Show.

THIS WAS IN

1992

NINETEEN FUCKING NINETY-TWO

"we’re all human, I don’t see color." - white people everywhere

THIS IS HOW YOU  FUCKING ALLY

"racism is mental illness" - jane elliott

also the white dude in this video is an ass. 

Reblogged from thebicker  3,888 notes

lightspeedsound:

nocakeno:

stardusted:

disney no chinese people don’t wear kimonos that’s a japanese thing, she is wearing a hanfu jfc, just because white people might not know the difference doesn’t mean you should mislabel it

jfc

also PS love conquers all is definitely not the moral of either the original Ballad of Mulan or the Disney movie swear to god the moral of the story is “women kick ass, often with fireworks”

Reblogged from thebicker  14,529 notes

postracialcomments:

peggys-magic-sex-feet:

iwriteaboutfeminism:

The police union held a press conference today to release information about the killing of VonDerrit Myers, whom they described as “no angel.”

Part One

Tuesday, October 14th

people on facebook are trying to say police recovered the gun used in his social media pics on the scene and that the sandwich was stolen……..oh, and somehow he was conveniently covered in GSR on his hands and waistband. because the cops couldn’t have just swiped their own fucking dirty hands on those places and transfered it deliberately.

^^^ I don’t trust their report period.