In Alaska, wolves hunt reindeer relentlessly

To avoid predation, arctic reindeer have evolved a life saving adaptation

They can see UV light, so a perfectly camouflaged wolf against the snow would appear black as it’s fur can’t absorb UV light
cutt.ly/2TWNRVw
And to capture even more light ...something amazing happens

As summer fades, reindeer eyes also change colour, to deep blue which further enhances the animals vision, helping it to see in dramatically different light levels

This is how it works.. cutt.ly/fTW1oFV
*So the wolfs fur absorbs the UV light whilst the surrounding snow reflects it*

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More from @gunsnrosesgirl3

13 Nov
Look at this leaf visibly producing oxygen as bubbles in the water as it continues photosynthesis

Half of the world's oxygen is produced by phytoplankton, the other half is produced by trees, all the more reason to look after our forests and seas 1/
By trees I mean all plants/trees and seas meaning all water, rivers lakes etc
Read 4 tweets
11 Nov
This is a nuclear reactor start up, you are seeing the core when the chain reaction becoming self sustaining.

The control rods are pulled up & as they are removed the number of fission reactions is increasing...1/
The water acts as a moderator in the reaction process as well as a coolant.
This fissioning of atoms creates heat that later generates steam to produce electricity. 2/
And this in the video is not a commercial reactor but a research and test one
Read 5 tweets
21 Aug
This is a dead leaf

Can you see that vibrant green defiant patch? That part is kept alive by the larvae of leaf mining insects, and even though its long fallen off the tree it’s still photosynthesising.

How and why?

📸images Mike Shurmer
Source cutt.ly/kQ8RqrX 1/
Leaf-mining insect lay eggs on leaves

After hatching, the larvae tunnel through into the leaf protected from predation and the plants own defences and eat leaf tissue creating little visible tunnel patterns 2/
these insects pass from generation to generation a certain bacteria that manipulates the leafs own signalling chemicals – hormones called cytokinins. These usually do many tasks preventing a leaf dying 3/
Read 5 tweets
21 May
The Golden Tortoise Beetle (Aspidimorpha sanctaecrucis) gets to stroll around looking beautiful in the rainy seasons of south east Asia but in its larval stage things were less glamorous... but extremely interesting read on .. 1/

Credit: IG sony_Thokchom
2/ In its larval stage their defence mechanism is a faecal shield or faecal parasol, which it uses as a weapon if threatened.
3/
Source of video in tweet 1 sony_Thokchom
Source of video in tweet 2 cutt.ly/3b4Shno

Even more bizarre if there is multiple larvae they form a pyramid with shields facing outwards and of mum is still around she places herself on top Like this cutt.ly/ab4Sk4R
Read 4 tweets
30 Mar
Reindeer Cyclones are a real thing... a swirling mass of threatened reindeer stampeding in a circle making it impossible to target an individual.. here the fawns are in the middle

This herd is on Russia’s Kola Peninsula, in the Arctic Circle
The video was originally posted on the Facebook page of the Museum of Anthropology and Ethnography Peter the Great, aka Kunstkámera, located in Saint Petersburg, Russia.
The video is worth watching to the end also here’s some reading cutt.ly/px5zQYq
Read 4 tweets
15 Sep 20
Does every fig contain a wasp?

Figs are are inverted flowers. There are males and females.

A female wasp (carrying pollen) enters a fig through an opening so tight she loses her wings and her antennae. If it’s a male fig, it is perfectly formed to lays her eggs inside. 1/
2/
The fig acts as a womb and a nursery to the offspring.

Once hatched the males who lack wings impregnate the females and dig tunnels through which the females escape.

Here you can see females climbing out. These will go on to repeat the cycle, taking pollen with them...
In this relationship there is also betrayal. Fig wasps are the fig tree’s closest allies yet in its reach to further its own reproductive aims, it deceives the wasp to climb also into female flowers, in which they can’t reproduce and it becomes their tomb. How does it do this? 3/ Image
Read 5 tweets

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