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learn on the web

Cancer science: was Angelina Jolie forced to do mastectomy?


Hank Green presents in SciShow why Angelina Jolie did mastectomy. Mestectomy is the procedure of surgically removing the breasts and that is a shitty thing, because I like her and ther movies. Too bad to hear that. Hank explains that she had a mutant gene in her DNA that raised the possibility that she could do breast cancer.

Different researches on the mutant genes BRCA1 and BRCA2, discovered (and patented) by Myriad, show that only a small fraction of those with this gene actually develop breast cancer.

It is said that 12% of the women will develop breast cancer sometimes during their lives. The BRCA1&2 mutations are present in about .1 – .2% of the population and having that mutation is an increased risk, not a diagnosis of the disease.

65% of the women that undergo mastectomy are using this procedure because of fear, as Hank explains it, and are not taking into account other options. So, as it seems, mastectomy should be last option used in these situations, but the decision is solely on each one of the affected women..

Categories
learn on the web

Most venomous and poisonous animals in the World and how to protect yourself using antivenom.


Hank Green explains in SciSchow the difference between venom and poison and shares a list of the most dangerous animals that generate toxic substances. Venom, if ingested (eaten) does not hurt you, but poison does.

One quote form the video is “It is not the poison that it kills you. It is the dose”. Great quote to put on the wall, of course.

Why is venom so dangerous? See in the post about why venom kills you and tell me that you want to be bitten :)) Veritasium has also a video in which he explains how to protect yourself when bitten by venomous snakes.

Some of the most venomous animals are: Australian Box Jellyfish, Cone Snails, Puff Aders, Inland Taipan, Brazilian Wandering Spider. Poisonnous: Golden Dart Frog.

Venom kills either by clogging the blood in your body or by usage of neurotoxins, that shut down electrical signals to the brain, resulting in cardiac arrest. So, keep clear of venomous animals, okay?

[UPDATE: 17.05.2013] I didn’t wanted to write a new post about this below you will find out hot to create an anti-venom. You need to milk the snakes, keep the venom in the freezer, inject animals with it and then those animals will create antibodies that can fight venom. Get some blood from those animals (a horse, for example) without killing them and then filter out the antibodies.

See the process below:

Categories
entertainment geek

Hank Green, from SciShow, tells us 53 terrible jokes

Hank Green is the presenter of SciShow, an amazing YouTube channel that teaches us many things about science in general and they also feature science news. Now he presents 53 jokes that he liked over the last year. He creates each year such joke videos and some of them are quite amazing.

Some of his jokes:
– How did a hipster burn his tongue? He drank coffee before it was cool.
– What is invisible and smells like carrots? Rabbit farts.
– How do you call a fish with no eye? A fish.
– When I found out that my toaster was not water-proof I was shocked!
– How do you call a pencil without lead? Pointless.
– Which side of the chicken has more feathers? The outside.
– Never trust an atom. They make up everything.
– My granddad had the heart of a lion and a lifetime ban form the zoo.

And there are many more. Have fun with science and learning new stuff everyday!

Via [Neatorama].