"According to the reports of the interstellar explorers who found the blue amber before, there are some large animals on the surface of the blue amber, so I need to be extra careful." Jiang Yicheng said as he walked, "But logically speaking, no matter what kind of environment the life form evolves into, it is instinct to seek advantages and avoid disadvantages. In general, native animals in an unfamiliar environment will not actively attack humans, because humans are also strange to them. ”

"So this is what I often say in live broadcasts, that is, if you are really trapped in the wilderness of an exoplanet, or even the wilderness on Earth, the first thing you need to do is not to panic psychologically."

Barrage: Sister One Orange - the natural enemy of alien animals [dog]

Barrage [Yellow]: Alien Monster (×) Alien Ingredients (✓)

Barrage: Earlier, Sister Yicheng just said not to eat indiscriminately......

Barrage: This is a meme [Khan]

The audience in the barrage chatted happily, but Jiang Yicheng did not have anything to do with "ease" on the ground. She soon noticed that places that had previously been thought to be lighter in color and might have water sources were getting closer but there was no sign of surface water at all.

Although it is common to find resources and not find them in the wild, she still can't help but be a little frustrated.

In her experience, if you can't find a water source on the first day, the rhythm of the entire survival challenge becomes "hard" mode.

And in this hot environment, if she doesn't get enough drinking water within three hours, she may not survive the next day. Not hydrating in the morning, and in the afternoon when the weather is hotter, she has to reduce her activities in direct sunlight to prevent dehydration, which means that she needs to continue to search for water at night when she is "blue amber" - which can be quite difficult for humans whose visual systems are not adapted to night vision.

Jiang Yicheng walked to the light-colored vegetation, and the drone's lens could already see the "grass" bush in front of her.

It's not accurate to say "grass", but these things don't seem to match the shrubs of the earth. In fact, the plants that grow on the ground are about one meter tall, and the structure that resembles the differentiation of stems and leaves is simpler than those "thatch", and it seems that each plant has only one leaf, half-rolled up like a trumpet towards the sky.

And the surrounding area is indeed a surface water source - there are no rivers and streams, not even stagnant pools.

"It's not good luck this time, there is no water here." Jiang Yicheng was a little depressed in her heart, but she still maintained her trademark smile at the camera, "But there is still hope...... The 'grass' here grows noticeably taller than elsewhere, and the terrain has a riverbed-like shape, probably a seasonal river. ”

"Plants that grow in such places may have a high water content, and they will most likely evolve a way of storing water and waiting for the next rainy season, so it is still possible to get water from their tissues."

"Let me try." Jiang Yicheng found a trumpet-shaped plant of a good size, and first tried to dig a few times at its roots, and the soil dug up was much darker than the previous ones, "You see, the soil here is relatively moist, which means that this river was still there not long ago." It means that there is hope for digging up plants that store water. ”

Barrage: Why can't you just eat soil?

Barrage: One of the famous scenes, orange digging sweet potatoes [funny]

Barrage: Is the one who eats soil serious???

Jiang Yicheng felt that there was less obstacle to digging the ground, so he adopted a more radical method: directly dragging the trumpet-shaped blades upward.

After two years of training in survival challenges, her hand strength has been improved like never before, and she actually pulled up the whole plant even with the "roots" - only that the trumpet-shaped leaves are not "roots" growing underneath, but a worm-like blue thing curled up because of stimulation.

"Oops, what is this......" Jiang Yicheng was also shocked by what she pulled out, but quickly returned to normal - she had seen a lot of things that violated the common sense of earth biology on other habitable planets.

Jiang Yicheng held up the worm-like thing that was still wriggling in front of the drone's camera: "As you can see...... I just thought it was a plant in our usual sense, but judging by the structure it is buried in the soil, it can also be considered an animal in a sense. ”

"Anyone who understands the evolution of extraphyletic life should know that there is more than one answer to the evolutionary route (1). Now it seems that there may still be some autotrophs with complex tissue differentiation and certain locomotor ability in the life system of Lanpera (2). ”

Barrage: It's too disgusting to see the farewell.

Barrage: Food Gain (1/1)

Barrage: Homogenization Warning [Squint]

Barrage [Yellow]: A Orange's live broadcast introduction wrote a warning, is it interesting for some people not to watch "disgusting" and "farewell" here?

Barrage [yellow]: I didn't ask you to see it, who do you think you are? Confusing Behavior [Spread Hands]

Barrage: Ripe Warning, Homogenization Warning [Squint]

Barrage [purple]: Don't get excited about the yellow word, Yicheng is famous now, it's normal for someone to dislike it, it doesn't affect her......

Barrage: That's right, quit if you don't like it, it's really not good to post "disgusting" and "farewell" here [Khan]

Barrage [Yellow]: It has no effect on my sister, this is to scold us fans disgusting [smile] [smile] (3)

Jiang Yicheng took the time to glance at the barrage, and unexpectedly found that there was another argument in the barrage, and hurriedly reassured: "I saw that some friends left a message saying that they deliberately said 'disgusting', this matter ...... Just thank you for your support in advance, survival in the wild is indeed inevitable to avoid something that looks a little 'disgusting', this thing honestly scared me, and it is also something that I have to face when coming into contact with other origin life systems. ”

"But people are diverse, and all kinds of phobias are real. Some people just can't stand these worm-like things, and it's normal for them to not understand us. It's not a serious fault to post 'disgusting' on the channel, so we don't have to worry too much about it. ”

"I also remind everyone here that friends with insect phobia, dense object phobia, giant object phobia, and motion sickness are not recommended to watch this channel, and it has already been written in the introduction. If you have the above phobic tendencies but are interested in this channel, I personally recommend not watching the live broadcast, you can first learn about the previous videos, and add a way to skip relevant shots in the editing process. Everyone's fear of disgusting is different, and there is no need to challenge your guts in this regard. ”

Barrage: Okay~

Barrage [Yellow]: Okay~

Barrage: Sister Orange reminds me again, my sister is so good [than the heart] [than the heart] [than the heart] [than the heart]

Barrage: Skip the relevant shots and praise!

Barrage: Don't be too sensy with some messages [cover your face]

"Well, let's talk about this autotrophic organism with complex differentiation and locomotor ability...... Jiang Yicheng tore off the worm-like animal "root" at the bottom of the leaf and wrapped it with the upper leaf, "The water content of these animal tissues is relatively high, and it is a part of metabolism that is relatively vigorous, so it can be kept as alternative food." I've mentioned the rule of finding food on exohabitable planets many times before, which is to prioritize soft active tissues, but avoid young tissues. ”

"Soft matter and activity usually indicate a high water content and a high metabolic rate, which means that the substances that make up these tissues have a relatively strong chemical reaction ability." Jiang Yicheng said as he collected these worm-like roots.

"Whether it is the digestion of a variety of carbon skeletons by the flora of our intraintestinal compound microbial agent, or the activity of life forms on extra-habitable planets, they all follow the basic principle of chemical reactions, and the chemical reaction activity of different structures is different. For those carbon skeleton types with dense structure and high bond energy, even the microflora of the compound is very slow to digest, so their energy supply efficiency is very low. Substances that are loosely structured and easily fractured by chemical bonds are also able to respond much faster to the microbiota when digested, and they are the preferred food supply source (4). ”

"But there's another point, why don't you choose young tissues...... Jiang Yicheng wrapped all the worm-like roots he dug up in leaves, "It's still due to chemical activity." ”

"We all know that what is toxic in organic matter is usually easy to react with other substances (5), and the most active chemical reaction in exophytes is young tissues, which means that if the organism contains some substances that are toxic to us humans, the content in young tissues will be higher."

"At the same time, it is also very likely that organisms have evolved toxicity to protect young tissues, although in most cases the toxicity has evolved against the metabolic pathways of other native predators, but it is also possible that metal ion chelators similar to cyanide are also common to humans, and we must take them into account."

Barrage [Green]: To sum it up, it's digging bugs and digging sweet potatoes [funny]

Barrage: Homogenization Warning [Squint]

Barrage: Ripe Warning [Squint]

Barrage [Purple]: I'm ready for lunch, waiting to see an orange eat insects [worms]

Barrage: Wait, aren't you looking for Gai'er? Why did you suddenly start talking about eating?

Barrage: As we all know, habitable planet survival live is a food channel [funny]

——————————

Exegesis:

(1) After the neutral mutation theory, modern evolutionary theory generally believes that evolution does not derive a single definite optimal solution, but has a certain randomness on the basis of adapting to the environment.

(2) "There is complex tissue differentiation" is emphasized here, because there are many autotrophs that do not have complex tissue differentiation and have the ability to move, such as the well-known Euglena. In protists, animals and plants are not distinct.

(3) Please understand the "smile" expression here.

(4) Regarding the source of food supply: the essence is the food that supplies the small intestinal flora, and the food of the host is the metabolite of the decomposition of bacteria.

(5) About toxicity: The toxic groups of highly toxic carbon-containing inorganic substances (such as KCN, CO, etc.) and highly toxic organic substances are often active electrophiles or nucleophiles, which are prone to chemical reactions, chelate and metabolize important metal ions or break protein chemical bonds, and are toxic to the earth's eukaryotes.

There are also some organic substances that are toxic by binding to important enzymes in metabolic pathways, such as rotenone, antimycin A, etc., but these substances themselves are more complex and are special products of the evolution of earth organisms in competition. For the life systems of exoplanets, there is also a high probability that native organisms will evolve complex toxic substances against other native organisms, but these substances are only ordinary carbon skeleton organic matter for terrestrial organisms.