C1 上級 1204 タグ追加 保存
動画の字幕をクリックしてすぐ単語の意味を調べられます!
単語帳読み込み中…
字幕の修正報告
If a cockroach walked by you right now… would you step on it? If so I get it
but you should know cockroaches are cooler than you might think.
Hey guys! What’s up? I’m Sapna here at DNews. Today we’re answering a question that came
from our subreddit page r/dnews-- The user “semihc” wants to know if cockroaches
have any benefit to nature? Well yes they do, Semi! Despite their bad reputation most
roaches play an important role in the natural world….and we humans may even be able to
learn a thing or two from these resilient creepy creatures.
I know it’s tough to see cockroaches as anything BUT AWFUL and no matter what we do
to try and get rid of them, they often outsmart us. For example, cockroaches eat pretty much
anything- your leftover steak, the soap scum in your bathtub - even the glue on an envelope.
Which is actually pretty incredible. Roach poison takes advantage of that, and tastes
sweet to the little buggers, they eat it and die. But, according to a recent study in the
journal Science, some cockroaches EVOLVED new body chemistry so the poison no longer
tastes good, thus no snack and no death.
Most people think of cockroaches as household pests, but there are actually about 4500 different
species of cockroach around the world, and less than 1% of them are the freaky ones that
scatter when we turn on the lights. Those in our homes are often covered in bacteria
and fecal matter- it sticks to them, they ingest it and defecate everywhere.
And proteins in their feces, saliva, and eggs are one of THE BIGGEST causes of allergies and asthma
for people living in urban environments. I know it's gross.
And maybe that’s more than you wanted to know about cockroach feces… Beyond the cities
where we live, it gets better! Cockroach poop is actually beneficial to the environment!
It plays a role in the earth’s nitrogen cycle. Forest roaches consume decaying organic matter
and release its nitrogen back into the soil through their feces…
so it can be used again by plants.
Most cockroaches -99.7% of them- live far away from people…. Mostly in wooded areas
.. and they actually do some good in the world. In some environments, they serve as pollinators for flowers.
And by consuming the decaying vegetation- the microbes inside their gut
break down plant materials that are often indigestible by most mammals
which is why some experts call cockroaches nature's janitors or decomposers.
Now, roaches are also an important source of FOOD for some species- like centipedes,
lizards and birds. And at least one species of wasp couldn't
live WITHOUT the cockroach. I think this is really cool! The parasitic emerald wasp stings a cockroach
and injects venom into a specific part of its brain which blocks voluntary movement.
The wasp then leads this zombie roach back to its burrow, lays an egg on it, and when
that egg hatches- the larva eats the roach from the inside out and emerges as a mature wasp.
I know it’s kind of disgusting but isn’t that awesome?
Cockroaches can help humans too, by the way. Because they survive in the filthiest of conditions,
their central nervous system produces natural antibiotics. We've found that their natural
defenses work even against antibiotic-resistant bacteria like staph aureus, also known as MRSA.
And scientists at Harvard's Biorobotics Laboratory are studying the LEGS of cockroaches, too.
Cockroach legs are not only springy and flexible-but they also work together seamlessly so the
insect can run at really fast speeds on uneven ground. By copying these evolutionary advantages,
scientists hope to design new prosthetics and mechanical hands!
So there you go Semihc. We love your question and yes
cockroaches really do play an important role in our ecosystem.
And….get this- engineers are actually turning roaches into robots….
You can see how and why in this video
So remote control doesn’t tap into the brain per se
Because the cockroach doesn’t navigate with eyes in the same way we do
But it used its antennae to feel for the walls or their predators.
This package stimulates the nerves in their antennae
The roach thinks that there’s a wall coming or harm
And it cause it to turn to the direction the controller wants
So what do you think about cockroaches now? Tell me down in the comments section down below
And don't forget to click subscribe!
And if you have any other questions let us know on our subreddit page:
r/Dnews. Thanks for watching.
コツ:単語をクリックしてすぐ意味を調べられます!

読み込み中…

Why Do Cockroaches Even Exist?

1204 タグ追加 保存
Vivi Lee 2016 年 7 月 25 日 に公開
お勧め動画
  1. 1. クリック一つで単語を検索

    右側のスプリクトの単語をクリックするだけで即座に意味が検索できます。

  2. 2. リピート機能

    クリックするだけで同じフレーズを何回もリピート可能!

  3. 3. ショートカット

    キーボードショートカットを使うことによって勉強の効率を上げることが出来ます。

  4. 4. 字幕の表示/非表示

    日・英のボタンをクリックすることで自由に字幕のオンオフを切り替えられます。

  5. 5. 動画をブログ等でシェア

    コードを貼り付けてVoiceTubeの動画再生プレーヤーをブログ等でシェアすることが出来ます!

  6. 6. 全画面再生

    左側の矢印をクリックすることで全画面で再生できるようになります。

  1. クイズ付き動画

    リスニングクイズに挑戦!

  1. クリックしてメモを表示

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔