13 Unsolved Scientific Puzzles

Written by Michael Brooks

Author Michael Books has investigated some of the most puzzling anomalies of modern science, those intractrable problems that refuse to conform to the theories. Here he counts down the 13 strangest.

Tourists watch the sun being blocked by the moon during a solar eclipse in the Australian outback

1. MOST OF THE UNIVERSE IS MISSING

We can only account for 4 per cent of the cosmos

If you’re wondering what the LHC might do for you, how’s this: it might just find a whole quarter of the universe. The collider is hoping to create some particles of what physicists call “dark matter”, an enigma that is thought to make up roughly 25 per cent of the universe. Then there is the “dark energy”, a mysterious force that seems to be ripping space and time apart. In total, a whopping 96 per cent of the universe has gone AWOL. Unless, that is, we’ve got our maths all wrong. Watch this space.

Times Archive: Pioneer 11 arrival at Saturn, 1974

3. VARYING CONSTANTS

Destabilising our view of the universe

A decade ago, we discovered that the fundamental constants of physics might not be so constant after all. These are the numbers that describe just how strong the forces of nature are, and make the laws of physics work when we use them to describe the processes of nature. Light that has travelled across the universe from distant stars tells us those laws might have been different in the past. Though the physical laws and constants have helped us define and tame the natural world, they might be an illusion.

4. COLD FUSION

Nuclear energy without the drama

In 1989, the world was rocked by claims that you could release nuclear energy without a catastrophic explosion. Various failures to replicate or explain these results soon ended the careers of the scientists involved. But, despite what you might have heard, “cold fusion” never really went away. Over a 10-year period from 1989, US navy labs ran more than 200 experiments to investigate whether nuclear reactions generating more energy than they consume – supposedly only possible inside stars – can occur at room temperature. Numerous researchers have since pronounced themselves believers. With controllable cold fusion, many of the world’s energy problems would melt away: no wonder the US Department of Energy is interested again.

5. LIFE

Are you more than just a bag of chemicals?

Are you more than the sum of the inanimate chemicals that make up your body? What turns a living tree into a lifeless piece of wood? No one knows. Researchers have even given up trying to define what life is. But they are still trying to understand it – by making it from scratch. In labs across the world, people are taking the raw materials of living things and trying to put them together in a way that makes them come alive. In an effort to resolve the anomalous nature of life, the idea of scientists playing God has taken a whole new turn. Times Archive: Dr Edmund Leach on when scientists play God, 1968

6. METHANE FROM MARTIANS

NASA scientists found evidence for life on Mars. Then they changed their minds

On July 20, 1976, the Viking landers scooped up some Martian soil and mixed it with radioactive nutrients. The mission’s scientists all agreed that if radioactive methane was released from the soil, something must be eating the nutrients – and there must be life on Mars. The experiment gave a positive result, but NASA denied an official detection of Martian life. Today, there is even more evidence that something is creating methane on Mars. Is it life? The Viking experiment suggests it was. Martin Rees, England’s astronomer royal, calls the search for extraterrestrial life the most important scientific endeavour of our time. But have we already found it? Times Archive: Spacecraft evidence suggests life on Mars was possible, 1976

7. THE WOW! SIGNAL

Has ET already been in touch?

It was an electromagnetic pulse that came from the direction of the Sagittarius constellation. It lasted 37 seconds and had exactly the characteristics predicted for an alien signal. Maybe that’s why, on 15 August 1977 it caused astronomer Jerry Ehman to scrawl “Wow!” on the printout from Big Ear, Ohio State University’s radio telescope in Delaware. The nearest star in that direction is 220 light years away. If that really is where is came from, it would have had to be a pretty powerful astronomical event – or an advanced alien civilisation using an astonishingly large and powerful transmitter. More than 30 years later, its origin remains a mystery. Times Archive: ET, The Extra Terrestrial, The Times review 1982

8. A GIANT VIRUS

It’s a freak that could rewrite the story of life

Mimivirus is sitting in a freezer in Marseille. Around thirty times bigger than the rhinovirus that gives you a common cold, it is by far the biggest virus known to science. But this virus’s biggest impact won’t be on the healthcare systems of the globe. It will be, most likely, on the history of life on Earth. Mimivirus doesn’t fit with the established story of how life on Earth got going. Mimi has a genome that, in parts, looks like yours. Mimivirus seems to be part of the story of life on Earth. It may even make us rewrite it.

9. DEATH

Evolution’s problem with self-destruction

Why must we die? It is a question that splits biologists, and over the years, theories have been batted back and forth as new evidence comes to light. One answer is that death is simply necessary – to avoid overcrowding, for instance. But evolution doesn’t – can’t – select for a “death switch” because evolution is supposed to be all about the inpidual. And yet there does seem to be a death switch: researchers have managed to locate genetic switches that massively extend the lifespan of some nematode worms. Can we solve the riddle of death? Times Archive: Why die? Experiments in immortality, 1921

10. SEX

There are better ways to reproduce

Sex is everywhere, but no one knows why. It is a question that “better scientists than I have spent book after book failing to answer,” says Richard Dawkins. To Charles Darwin, the reason for the prevalence of sexual reproduction was “hidden in darkness”. All the arguments in favour of sexual reproduction are countered by stronger arguments in favour of self-cloning: asexual reproduction, where an organism produces a copy of itself, is a much more efficient way to pass your genes down to the next generation. There’s no proof that sex makes a species more resilient, or better placed to cope with change. Why is it still around? Times Archive: Darwin on the Descent of Man, 1871 Part 1 Part 2

11. FREE WILL

Your decisions are not your own

Our gut instinct, our experience, is that we make the decisions to move, to think, to eat, to steal, to lie, to punch and kick. We have constructed the entire edifice of our civilisation on this idea. But science says this free will is a delusion. According to the world’s best neuroscientists, we are brain-machines. Our brains create the sense that somewhere within them is the “you” that makes decisions. But it is an illusion; there is no ghost in the machine. What does this mean for our sense of self? And for our morality – can we prosecute people for acts over which they had no conscious control? Times Archive: Necessity and free will, 1877

12. THE PLACEBO EFFECT

Who’s being deceived?

The placebo effect used to be thought of as just a manipulation, a mind-trick. Doctors wore white coats, spoke in soothing tones, exuding confidence and medical know-how, and if they told you a pill would make you better, it would. By the time you found out it was just a sugar pill, you were feeling great, so who cares? Well, lots of people, actually, because our new understanding of placebo is messing up medicine. Some prescription drugs that were judged to perform “better than placebo” in clinical trials don’t work unless you know you’re taking them. All in all, the gold standard of medicine, the placebo-controlled clinical trial, is looking a little peaky. Times Archive: Science report: Endorphins and the placebo effect, 1978

13. HOMEOPATHY

It’s patently absurd, so why won’t it go away?

Homeopathy’s claim is that you can take a substance of dubious properties, dilute it to the point where there are no molecules of the original substance left in the sample you have, and still use it to heal sickness. Sir John Forbes, the physician to Queen Victoria’s household, called it “an outrage to human reason.” There is no justification in all of science for this idea — and yet there remains some slim evidence that homeopathy works. How can this be? Times Archive: Advertisement: The New Homoeopathy, 1914

13 Things That Don’t Make Sense – The Most Intriguing Scientific Mysteries of Our Time by Michael Brooks is published by Profile Books, £12.99 More information at Michael’s website.

16 thoughts on “13 Unsolved Scientific Puzzles

  1. Parkylondon

    And number 2 is where exactly? Is it 13 with #2 missing or is it 12 misnumbered? If, as, and when this is corrected please feel free to delete this comment.

    Parky

  2. Ambuj Saxena

    Obviously the author hasn’t been reading scientific literature in the past 20 years, or is just trying to get cheap attention by claiming things as puzzles that have long been considered resolved.

    BTW, I also noticed what Parky did.

  3. Homeless Pie

    We die because oxygen is actually poisonous to our bodies. It slowly kills us. However, it is the only element that can cause the redox reactions used to fuel our bodies and keep our cells alive. That’s why we die, but maybe we can change the rate, it’s unlikely, though.

  4. Common Sense

    “We can only account for 4 per cent of the cosmos.”

    That’s because we can only detect and decode so much with our limited 5 physical senses.

    “Are you more than just a bag of chemicals?”

    No. The substance of the universe isn’t matter, its consciousness. Consciousness is a step above matter. Our bodies are vessels, created by nature, to experience this reality. Objectivity is flawed. If science keeps leaving out consciousness while trying to prove silly things like matter creates life, they’ll have to keep going back to the drawing boards, like they’re doing now. One important thing about science to keep aware of is when scientists keep trying to prove something doesn’t exist, the more they prove it does.

    “Evolution’s problem with self-destruction”

    This is a part of the nature of the universe: the finite life contained within the infinite as a whole. As I said, who we really are is consciousness, and that is forever.

    “Your decisions are not your own”

    Again, we’re CONSCIOUSNESS… our brain only decodes this reality for us to experience. Our physical brain isn’t who we are, to think so is complete and utter lunacy.

    “Who’s being deceived?”

    Again, consciousness supersedes matter. Being able to heal ourselves is an ability mankind will (hopefully) master in the future (obviously far into the future, if there is one). It goes to show just how powerful the MIND (not the brain) really is.

    Of course no one will be able to understand this purely with left-brain (so-called) logic – it won’t ever work. The intelligent person will use both ‘halves’ as a whole. Sure, we know the mechanics of our brain (barely), but do we know the mechanics of consciousness? No, we (as a species) don’t. It is of my opinion that if people thought ABOUT thought there would be world peace, no question about it.

    “One thing is sure, a great change of our psychological attitude is imminent, that is certain…because we need more…we need more psychology, we need more understanding of human nature because the only real danger that exists is man himself, he is the great danger, and we are pitifully unaware of it, we know nothing of man, far too little. His psyche should be studied because we are the origin of all coming evil.” – Carl Gustav Jung

    Love that quote. But, the same goes for us finding out more about the universe. I can tell you one thing, the more we look through a telescope, or a microscope, the more we’re finding about who we are, because we see the seemingly apparent ‘out-there’ universe as we are, not as it is. We know absolutely jack about the universe, because if we were so damn intelligent we wouldn’t have any of the silly problems we have now – that much is just common sense.

  5. caseywollberg

    Common sense: the popularity of such obscurantism as you blathered on about here is a reminder that your moniker is an oxymoron.

    “The substance of the universe isn’t matter, its consciousness. Consciousness is a step above matter.”

    What does that mean and how the hell do you know? The answers are, it is meaningless, and you don’t.

  6. mack

    Sex- that one has been known for a long time

    Most multicellular organisms that have the ability to reproduce asexually also have the ability to reproduce sexually. Sex is necessary to evolution it is in essence the driving force of evolution. Can you think of any large organism that ever existed and reproduced asexually. Sex always the various combinations of the gene pool to mix and produce a possible improvement or weed out a disadvantage, via inevitable death before sexual maturity or impotency, were an asexual creature would reproduce an exact copy of itself with the exact same genetic code.

    More accurately, mutations are the driving force of evolution. In multicellular organisms with dedicated reproductive cells, mutations can be subdivided into germ line mutations, which can be passed on to descendants through their reproductive cells, and somatic mutations, which involve cells outside the dedicated reproductive group and which are not usually transmitted to descendants.

    Nonlethal mutations accumulate within the gene pool and increase the amount of genetic variation. The abundance of some genetic changes within the gene pool can be reduced by natural selection, while other “more favorable” mutations may accumulate and result in adaptive evolutionary changes.

Comments are closed.