Now Playing Tracks

nanodash:

This is Alexandrite, it’s also called “emerald by day, ruby by night”

It changes colour based on whether the light source is from the sun or from a candle.

It does this because Alexandrite strongly absorbs yellow light due to chromium ions in its crystal structure, leaving the other colours behind. Light from the Sun emits all colours, but it peaks in the green, and our eyes are most sensitive to green, so in Sunlight Alexandrite is green.

Incandescent lights are things like candles and filament light bulbs. They also emit all colours of light, but they peak far, far into the red, so there’s not nearly as much green or blue, so under those, Alexandrite is red. 

Gemstones are awesome.

wollffeey:

wookieeoftheyear:

king-in-yellow:

hopephd:

Seizure First Aid. 

Learn it. Share it. Know it. Use it. 

100% correct medical information on tumblr for once; also consider calling 911 if you don’t know how often the person has seizures and ESPECIALLY if the seizure has lasted 5 minutes or more (which is why the watch is critical)

I wish I would have seen this a couple of days ago because a gentleman had a seizure in my store yesterday and only a couple of people knew how to respond. This is good information to know.

My brother has epilepsy, and while I don’t think his seizures happen while he’s awake, his condition has been getting worse over the last decade, so it would be nice if a bystander happened to know these things in case he ever did have one while awake.

This Phone App Helps Transgender Users Change The Pitch And Tone Of Their Voices

fileformat:

glsen:

buzzfeedlgbt reports on this amazing app:

The app’s website states it will take at least 6 to 12 months to effectively alter one’s voice. This video clip features an example “before and after” segment, having a user sample her “original” and “altered” voice:

As one user of the app put it: “Voice can be a real liability. There are definitely large parts of this country, even this state, where it’s dangerous to be trans. It can be a matter of life or death.”

At just $4.99, this app is a far more affordable option for users than visiting a vocal coach or speech pathologist. What a great resource!

mexican innovation :-)

danglingthpider:

notcrazyiswear:

I’ve put together a simple chart that explains the various ways you should and shouldn’t summon a waiter over to your table, and the service you’re likely to receive accordingly.

Because if one more middle aged, obnoxious asshole goes “hey you!” and snaps their fingers at me, I WILL snap said person’s neck.

I waitressed my way through college and one night this guy yells at me “Oi! you with the tits!” and my co-worker Matthew walked up to him and said “yes?”

To Tumblr, Love Pixel Union