Over 1.5 billion people use the internet every day, and they search for pretty much anything.
Like “Why are barns red?” and “What’s up with gluten?”
We here at SciShow are all about fostering curiosity.
That’s why we’ve worked with Google and YouTube to answer ten of the most popular
questions searched on the internet.
This is The World’s Most Asked Questions.
Today’s question: What is love?
It’s the kind of thing that keeps poets and philosophers up at night, but science
actually has a pretty good explanation for it, too.
Actually, several explanations.
And the answer might change depending on what kind of scientist you ask.
A biologist would say it’s all about reproduction, and the evolution and survival of a species.
A psychologist may go on about our need for togetherness and acceptance.
But possibly the best way to understand love is through chemistry.
Although the heart is our symbol of love for some reason, when it comes down to it, love
is all about the brain.
We know this because we can actually see love in action in brain scans.
And you know what?
It looks a awful like a brain on cocaine.
As a person first falls in love, at least a dozen different brain parts light up to
release powerful chemicals — hormones and neurotransmitters — that trigger feelings
兴奋 狂喜 结合 忐忑的情绪
of excitement, euphoria, bonding, and butterflies.
Research also shows that the kind of unconditional love between a mother and child activates
slightly different regions of the brain.
Early romantic love and attraction, what you might call passion,
is all about flooding the brain’s reward systems
in a tsunami of feel-good chemicals like adrenaline, norepinephrine, and dopamine.
This is why a brain on intense new love looks a whole lot like a brain on coke — adrenaline
and norepinephrine amp up your heart rate and get you all restless, while those dopamine
drips leave you feeling euphoric.
These chemicals light up your brain’s pleasure centers, lowering your pleasure thresholds,
and making it easier to feel good about… everything.
Interestingly, this kind of passionate new love is also marked by lowered serotonin levels,
similar to those found in people with obsessive-compulsive disorders — which may help explain those
30 texts your infatuated new lover sent while you were in the shower.
最终 一段新的恋情中剧烈的 痴迷的成分会沉淀成
Eventually, most of these more intense, obsessive components of new love settle down into a
deeper, calmer form of love associated with attachment and bonding.
Here your brain chemistry starts changing again, and hormones — like oxytocin and vasopressin
— take over.
就像Al Green歌中唱到的 它们使得你们呆在一起
Their mission, like Al Green’s, is to get you to stay together.
You may have heard of oxytocin, the so-called the “cuddle hormone.”
它在性高潮时释放 在妇女分娩时产生 而且它能够
It gets released during orgasms, and for women during childbirth, and it helps cement bonds
And you can think of vasopressin as the monogamy hormone.
And you know who’s taught us more about how it works than anything else?
Prairie voles, one of the very few mammals that mate for life.
在交配之后 一只雄性土拨鼠的脑中充满了后叶加压素 基本上
After mating, a male vole’s brain gets flooded with vasopressin, and essentially gets hooked
on his mate forever.
The two then have lots of sex, and all that tiny boot-knocking keeps the vasopressin flowing.
When researchers gave voles a compound that suppressed the effects of vasopressin, the
pairs quickly fell apart, losing their devotion to each other.
所以 在诗歌中 爱可能总是神秘的 但是从科学的角度看
So, while in the poetic sense, love may always be something of a mystery, from the scientific
view, it is within the realm of comprehension.
But what about you?
How are the love lives of the SciShow viewers?
Well, of our survey takers, people within the ages of 51 and 60 are the most likely
to have been in love.
People who got their energy most from exercise were also more likely to have been in love.
On the other hand, people who said they got their energy from food were less likely to
have been in love.
Of all the fascinating questions in the world, what question do you want answered most?
请在Facebook Twitter上参与评论 我们会
Let us know on Facebook or Twitter or in the comments down below, and we will answer the
best questions in a new video at the end of the month.
And don’t forget to use the hashtag #WMAQ and stay tuned for other videos this week.