sixpenceee:

A mass extinction are period on Earth’s history where an abnormally large number of species die out simultaneously or within a limited time period.
Here are the 5 biggest:
Ordovician-Silurian mass extinction:  During this time most life was in the ocean. Sea creatures like the trilobites, brachiopods and graptolites were wiped out. Almost 85% of them were completely gone. What happened was there was an ice age that caused a climate change. Sea levels fell and the chemistry of the ocean was messed up.
Late Devonian mass extinction: This was a series of extinctions over the course of a million years, and not a single event. Life in shallow seas were impacted. Much of the sea bed became devoid of oxygen. Changes in sea level, asteroid impacts climate change have also been blamed for this mass extinction.
Permian mass extinction: This mass extinction has been nicknamed the great dying. A staggering 96% of species have died out. All life on Earth today is the surviving 4%. There were at least two separate phases of extinction spread over millions of years. Marine creatures were particularly badly affected and insects suffered the only mass extinction of their history. Many causes have been proposed for the event: asteroid impact, flood basalt eruptions, catastrophic methane release, a drop in oxygen levels etc. 
Triassic-Jurassic mass extinction: Climate change, flood basalt eruptions and an asteroid impact have all been blamed for loss of life. Many types of animal died out, including lots of marine reptiles, some large amphibians, many reef-building creatures and large numbers of cephalopod molluscs. Roughly half of all the species alive at the time became extinct. Strangely, plants were not so badly affected.
Cretaceous- Tertiary mass extinction: This is famed for the death of the dinosaurs. Many other organisms perished however such as flowering plants & ammonites.This extinction was due to flood basalt eruptions affecting the world’s climate, combined with drastic falls in sea level. Then a huge asteroid or comet struck the seabed near the Yucatan Peninsula in Mexico. 
Many propose that the next big extinction won’t be because of natural disasters but because of man made ones. 
SOURCE

sixpenceee:

A mass extinction are period on Earth’s history where an abnormally large number of species die out simultaneously or within a limited time period.

Here are the 5 biggest:

Ordovician-Silurian mass extinction:  During this time most life was in the ocean. Sea creatures like the trilobites, brachiopods and graptolites were wiped out. Almost 85% of them were completely gone. What happened was there was an ice age that caused a climate change. Sea levels fell and the chemistry of the ocean was messed up.

Late Devonian mass extinction: This was a series of extinctions over the course of a million years, and not a single event. Life in shallow seas were impacted. Much of the sea bed became devoid of oxygen. Changes in sea level, asteroid impacts climate change have also been blamed for this mass extinction.

Permian mass extinction: This mass extinction has been nicknamed the great dying. A staggering 96% of species have died out. All life on Earth today is the surviving 4%. There were at least two separate phases of extinction spread over millions of years. Marine creatures were particularly badly affected and insects suffered the only mass extinction of their history. Many causes have been proposed for the event: asteroid impact, flood basalt eruptions, catastrophic methane release, a drop in oxygen levels etc. 

Triassic-Jurassic mass extinction: Climate change, flood basalt eruptions and an asteroid impact have all been blamed for loss of life. Many types of animal died out, including lots of marine reptiles, some large amphibians, many reef-building creatures and large numbers of cephalopod molluscs. Roughly half of all the species alive at the time became extinct. Strangely, plants were not so badly affected.

Cretaceous- Tertiary mass extinction: This is famed for the death of the dinosaurs. Many other organisms perished however such as flowering plants & ammonites.This extinction was due to flood basalt eruptions affecting the world’s climate, combined with drastic falls in sea level. Then a huge asteroid or comet struck the seabed near the Yucatan Peninsula in Mexico. 

Many propose that the next big extinction won’t be because of natural disasters but because of man made ones. 

SOURCE

goldenclitoris:

when u know u mama mad at u but u gotta walk past her to get food from the kitchen
image

Straight White Boy Problem #440

straightwhiteboyproblems:

i have a lot of books to carry around school but i just throw them in my locker. why? im too focused on making my backpack look small. the smaller my backpack is, the cooler i am. dont ask me why

raise ur hand if you’re ready to ditch your body and become a sentient cloud of cosmic gas

is this grunge enough

su-ic-id-al:

I want it to be 2004 again and come home from 1st grade and grab a chocolate chip granola bar and watch lizzie mccguire and thats so raven and not hate myself

true as fuck zodiac - prominent features
aries: so fucking stubborn. they will hold a grudge til the end of time
taurus: they are fucking nerds.
gemini: defo the random outbursts
cancer: rudeness. so fucking rude. god damn.
leo: they're about 4'9"
virgo: they don't want to talk to you at all
libra: weird ass laugh
scorpio: the fact that you can directly see hell in their eyes
sagittarius: fuckin strange ass humor
capricorn: creepy fucking smile
aquarius: kinda givin off a gay vibe
pisces: p conceited and that shit is not confidence as they may think it is
KID : mommy, i cant sleep, there's a monster under my bed
MOM : that's silly, theres no such thing as mo- OH GOD ITS TEARING MY ARM! Just kidding, he only eats kids, goodnight!
furiousfragileandfree:

I’m gonna say this every time someone asks me why I stretched my ears.

furiousfragileandfree:

I’m gonna say this every time someone asks me why I stretched my ears.

officialheinzdoofenshmirtz:

behold, it is i, the evil social justice warrior, here to ruin your fun by pointing out that you’re being kind of an asshole