Category Archives: science of life
Love at first sight? Desire in a bottle? There have been a lot of claims about what pheromones can do, but what is the science? Dr. George Preti and Dr. Charles J. Wysocki of the Monell Chemical Senses Center discuss the chemistry of pheromones and how mood and emotion can be communicated through chemical signals.
I was sitting in the lobby of my accountant’s office, flipping absentmindedly through a magazine when she walked in. I’ve never had a visceral reaction as when I saw her walk through that door. There was just something about her; I felt head over heels… My heart started racing and I had butterflies in my stomach…
This is the amazing time when you are truly love-struck. With an irresistible cocktail of chemicals, our brain entices us to fall in love. But is it really us or is it yet another nature’s trick to keep our species alive?
Scientists agree that there are three stages and processes in love:
When you fall in love, your brain starts sending signals before you can even blink. Your heart races and palms sweat: adrenaline is getting released from neurons. Then, when you are close to your sweetheart, dopamine is released, which triggers euphoria and feelings of bliss, increased energy, increased energy, less need for sleep or food, and focused attention on your new relationship. Phenylethylamine (PEA) is the chemical responsible for releasing adrenaline and dopamine. Biologically speaking, with the combination of dopamine, adrenaline, and PEA in your body, you’re experiencing something similar to a cocaine high. And it doesn’t matter whether you just met this *special* person or you ‘ve known them for ages; these love signals can be released at any time. Actually, no, not at any time. Only when mother nature thinks the timing is right** (see below).
Stage 2 – Lust: Testosterone kicks in
That is about the time that androgens and estrogens kick in. Estrogens and androgens are steroids, which are the female and male sex hormones, respectively. Testosterone is the sex hormone in both male and females, which is what gives us libido and sex drive. This hormone is elevated when we are in love. This makes sense as you’re most concerned about sex when it’s most likely to result in reproduction. Some people argue that this Stage precedes Stage 1, but it’s up to you to decide 🙂
Stage 3 – Attachment: Oxytocin, the love hormone
In the long run, two other hormones make their headway when emotionally involved: the “hormones of attachment”, oxytocin and vasopressin.
Oxytocin is a hormone stored in the brain. When the hormone is released in the brain, it results in feelings of attachment and bonding. It has been found that oxytocin gets released at orgasm, which is why couples feel much closer to one another after they have had sex. Oxytocin is also released at childbirth and is partly responsible for the strong bond between mum and baby (actually oxytocin has a Greek root: “οξυτοκίνη”, which means “quick birth”). So, if you feel the urge for a stay-at-home movie night to cuddle with your beau, it may be oxytocin at work.
Vasopressin is another important hormone when it comes to relationships. Scientists studied the prairie vole, which is known to be monogamous and to express vasopressin like humans. When the researchers introduced vasopressin receptors to the “meadow vole”, the promiscuous cousin of the prairie vole, these playboys reformed their ways and fixated on one female, choosing to mate with only her – even when other females tried to tempt them!!
Wondering why some people find it hard to get emotionally involved or committed?
Some people might be less prone to form stable relationships because they might be not express as many “oxytocin or vasopressin receptors” (proteins that take up oxytocin or vasopressin) in their brains. Thus, some people are not that sensitive to the “commitment hormones” oxytocin and vasopressin. Experiments in animals showed that if you remove the oxytocin or vasopressin receptors, these animals cannot form strong bonds with each other any more.
Timing is important. The perfect partner can sit right next to you at a party, and you might not notice him or her if you’re too busy at work, enmeshed in another relationship, or otherwise preoccupied. But if you’ve just moved to a new city, recovered from an unsatisfying love affair, begun to make enough money to raise a family, are suffering through a difficult experience, or have a good deal of spare time, you are ripe to fall in love.
Romantic love evolved to enable you to focus your energy on just one person at a time, conserving time and energy. The sex drive evolved to get you out there looking for partners. Attachment, the feeling of security you can feel with a long-term partner, evolved to help you stay together long enough to raise kids.
Watch this!! – I just found this amazing video that offers a very entertaining introduction into the particles and forces that make up me, you, the earth, the universe. Featuring Morgan Freeman, Stephen Hawking, Michio Kaku, Brian Cox, Richard Feynman, and Frank Close, this video offers a cursory introduction to quantum chemistry – the science that governs the interactions of subatomic particles, atoms, and even molecules.
Basically, in 3 and a half minutes, the video tries to explain that:
Dig deep inside the atom
and you’ll find tiny particles
Held together by invisible forces
The atoms that we’re made of have
Negatively charged electrons
Whirling around a big bulky nucleus
The universe is made of
Twelve particles of matter
Four forces of nature
The world is a dynamic mess
Of jiggling things
In the quantum world electrons behave as waves and as particles
For the ultimate triumph of science
We need a theory of everything
Which is still just beyond our grasp
The theory of everything is the Holy Grail of Physics: A theory that will explain through a single model everything from Creation, to supernovas, to atoms and molecules, perhaps even DNA, people, and love. (The four yet unified forces of nature are: gravitation, electromagnetism and the weak and strong nuclear forces that keep together elementary particles.)
If we ever create this theory, we might answer questions such as:
- What happened before the big bang?
- Is it possible to build a time machine?
- Can we punch a hole in space?
“The Quantum World” music video is the eleventh installment in the ongoing Symphony of Science music video series. Materials used in the creation of this video are from:
http://symphonyofscience.com for downloads & more videos!