Reading Isn't Enough I Need To Swallow The Book Whole

reading isn't enough I need to swallow the book whole

More Posts from Csmsdust and Others

2 years ago
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On
Nothing Is As Tender As Annotating Your Favourite Books. It’s Like Leaving A Piece Of Your Heart On

nothing is as tender as annotating your favourite books. it’s like leaving a piece of your heart on the pages for somebody else to find.

2 years ago

Other Minds: The Octopus and the Evolution of Intelligent Life - William Collins

William Collins
BBC R4 Book of the Week‘Brilliant’ Guardian‘Fascinating and often delightful’ The TimesWhat if intelligent life on Earth evolved not once, b

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1 year ago
Morphological Differences Between Thorns, Spines, And Prickles

Morphological differences between thorns, spines, and prickles

2 years ago

Hello! Why did penguins evolve to have black feathers if they live in icy (mostly white?) locations? I understand them having a white tummy because when swimming they could be more difficult to identify by a predator swimming below them? Thanks!

Love your blog!

Hello! So, here's what I learned at uni:

the widely-accepted reason penguins have black feathers is the same reason they have white tummies, but backwards. When swimming, they are more difficult to identify by a predator swimming above them! You can see similar countershading in sharks and dolphins, and also on land animals like mountain goats and lizards. Overall, it helps to make animals less obvious when viewing from the side, because it reduces the obviousness of their shadow.

Hello! Why Did Penguins Evolve To Have Black Feathers If They Live In Icy (mostly White?) Locations?

As to why penguins have black feathers in icy, mostly white, locations (on LAND), you need to consider why it would be good to be white in an icy, white location in the first place!

Mostly, it would provide camouflage, which would protect from land predators! However, penguins don't really have any significant land predators in Antarctica. There are no polar bears, or big snakes, or even foxes or coyotes in Antarctica, so the penguin won't benefit from being camouflaged on land. Basically, there's no "selective pressure" for them to be all white!

some penguin chicks, however, do have to worry about a few predators, so they have a little more camouflage than the adult penguins:

Hello! Why Did Penguins Evolve To Have Black Feathers If They Live In Icy (mostly White?) Locations?

What's more, there are likely advantages to black feathers in a cold environment like Antarctica! For example, in the sun, dark feathers absorb more thermal energy, helping to warm the penguin and maintain their body heat.

There may also be some stuff with black feathers being more resistant to wear/ friction drag in the water, but that's entering the realm of ongoing research, which I won't get into here.

Let me know if there's anything that needs clarifying!

(some citations if anyone wants further reading:)

Bonser, R. H. (1995). Melanin and the abrasion resistance of feathers. The Condor, 97(2), 590-591.

Ksepka, D. T. (2016). The penguin's palette--more than black and white: this stereotypically tuxedo-clad bird shows that evolution certainly can accessorize. American Scientist, 104(1), 36-44.

Rowland, H. M. (2009). From Abbott Thayer to the present day: what have we learned about the function of countershading?. Philosophical Transactions of the Royal Society B: Biological Sciences, 364(1516), 519-527.

Zagrai, A., & Hassanalian, M. (2020, July). Penguin coloration affects skin friction drag. In 2020 Gulf Southwest Section Conference.

9 months ago
Starting Uni Again + Honorable Mention, My Support Animals
Starting Uni Again + Honorable Mention, My Support Animals

Starting uni again + honorable mention, my support animals


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8 months ago
2 years ago

Wake up babe new aperiodic tiling dropped

cs.uwaterloo.ca
Wake Up Babe New Aperiodic Tiling Dropped

Aperiodic tiling with only one tile!

2 years ago

We take for granted our special ability to describe abstractions - such as "tomorrow" yet such abstractions are only made possible by language.

-Donald B. Calne , within reason

The limits of my language means the limits of my world.

-Ludwig Wittgenstein


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