Science Advocacy
Science Advocacy
If you google “fad diets”, you will eventually run across the tapeworm diet. As it’s name suggests, this diet involves ingesting tapeworm eggs in an effort to loose weight. Now, tapeworms do feed off the nutrients you eat and in theory having a bunch of them in your intestines could result in weight loss, however, this is both disgusting and dangerous. Let’s learn about tapeworms!
What are tapeworms and how do people get them?
Tapeworms are parasitic flatworms. There are over a thousand known species of tapeworm, and at least one of them can infect every known vertebrate animal (vertebrates are animals with a backbone). That includes all birds, reptiles, and fish. Humans can be infected by at least 13 different species of tapeworm. The most common tapeworms in humans are as follows:
Welcome to “chemicals and society,” where we highlight the current understanding of the biological effects and safety of some of the most common chemicals in today’s society.
What is radon?
Radon is an element with the atomic number of 86. Radon is always radioactive, which means it is unstable and releases energy in the form of alpha decay radioactivity (other types of radioactive decay include beta and gamma decay). Usually, in terms of human health, alpha decay radioactivity is the least concerning, because the alpha particles generally cannot penetrate through clothes or skin. Radon, unfortunately, is a gas, and that makes it dangerous, because you can breathe it in, and once inside you, the radioactivity can damage your lungs.
How are people exposed to radon?
Radon doesn’t hang around very long; it has a half-life of less than 4 days. However, it is a breakdown product of uranium and thorium, which are two of the most common radioactive elements in the Earth’s crust. This means that if there is any uranium or thorium in the soil, radon will always be present, because it is constantly being generated by the decay of these other radioactive elements. Radon is actually just one stop on a long chain of “daughter” elements in the stages of decay for uranium and thorium, as they eventually decay into lead, but it is the one we are most concerned with because it is the only one that is a gas, while all the rest are solids.
Things started out really well for Pluto in the eyes of those of us Earthlings. It was formed 4.6 billion years ago with the rest of our solar system, and since then had been hanging out in a distant orbit around the sun. Clyde W Tombaugh discovered Pluto in 1930, and it was named after the Greek god of the underworld, apparently based on the advice of an 11-year old girl. At this point, it became the 9th planet in our solar system, and it remained a planet in the eyes of humanity for many years, the Pizza that our mothers served us in the old school mnemonic:
My Very Excellent Mother Just Served Us Nine Pizzas.
But things started to change for Pluto in 1978. It was then that Pluto’s moon Charon was discovered. The presence of the moon allowed astronomers to calculate Pluto’s size accurately based on Charon’s orbit. It turned out that Pluto was really small. Originally thought to be larger than Mercury, it turns out Pluto was way smaller – only 1/25th the size of Earth and smaller than 7 moons in our solar system: Jupiter’s Ganymede, Callisto, Io, and Europa, Saturn’s Titan, the Earth’s moon, and Neptune’s Triton. That didn’t seem very planet-like…
Ridiculous question from the internet: If we are just chemicals, molecules, then each molecule must also be self aware, mustn’t it?
Source of said ridiculous question: Quora.com
Science’s answer: Nope. Think of it this way: you wouldn’t say that the molecules in a glass of sugar water were self aware, right? If you were to drink the sugar water, some of the molecules of water and sugar would end up in your brain, but would still not be self-aware. “Self awareness” is the ability to recognize yourself as separate from other similar organisms. Some say that this requires the ability to communicate on some level, since in order to recognize yourself as different from others, you would need a “name” to call yourself. It is believed that, besides humans, apes, monkeys, elephants, dolphins, and magpies are capable of self-awareness. Individual molecules are not.
Welcome to Bad Science on the Internet! Here, we highlight some of the crazy and sometime dangerous stuff people post online, and then give you the facts.
The bad science: Oxygen therapies like oxygen bars and oxygen “shots”
What do they claim? There are lots of claims, including improving general health and energy levels, aiding alertness and concentration, detoxifying the body, boosting the immune system, and treating diseases like headaches, hangovers, and even cancer.
Are they trying to sell you something? Yes! Most oxygen bars will charge you about $1 per minute, while oxygen shots typically cost $5-$10 per shot.
Is any of this true? No, no, no, no, no, no, a thousand times no. Look, we all know that we need oxygen to live, but more is not better – with oxygen or really anything.
When you breathe, oxygen goes into your lungs and is picked up by the red blood cells in your blood. Specifically, it binds to the iron-containing hemoglobin within those cells. There is a lot of hemoglobin in your red blood cells, and this is what makes them (and your blood) red. In a “normal”, healthy person (and unless you are very sick, you are normal, despite what your mommy taught you), the hemogloblin in the blood is at 95-100% saturation at all times. Anything below 90% is a problem, and would require medical intervention. Since hemoglobin is what moves oxygen from your lungs to all the tissues of your body, this means that adding more oxygen into your lungs can not, and will not significantly increase the delivery of oxygen to the tissues and organs of your body. That’s right, that oxygen that you are paying money for just goes into your lungs and, finding no room on the hemoglobin express, goes right back out when you exhale. Given this, it’s not surprising that oxygen therapy has no effects.
Welcome to Ask a Scientist, where we answer questions from our readers on a wide range of scientific topics. Got a scientific question? Drop us a line.
I see adds for a supplement called Elysium all over FB, and they seem to have real science behind their product. If it safe? Should I be taking it? – M.B. Boston, MA
Great question. First, some background. Many people know Elysium as a mediocre (58% audience score on Rotten Tomatoes) Matt Damon movie from 2013. Classics scholars will remember Elysium from Greek mythology as a heaven-like place where righteous people go after they die. It is likely that the supplement company (the product is actually called Basis) and the movie where both named after the Greek myth.
The Elysium Basis supplement contains Nicotinamide riboside, which is a precursor for a common and essential enzyme cofactor called nicotinamide adenine dinucleotide (NAD+), and pterostilbene, which is a chemical similar to resveratrol. You may have heard of resveratrol as the “active” antioxidant molecule in red wine. You can buy resveratrol supplements in any health food store. Elysium (the company, not the Matt Damon vehicle) has indeed been all over Facebook lately, and their website is impressive. They list 7 (!!) Nobel Price winners as members of their advisory board, plus a number of other accomplished scientists. Their website is really nice, and they highlight research and discovery efforts much like a biotech or pharmaceutical company would. They have even run a clinical trial with the Basis supplement! Honestly, they have done a great job of providing the appearance of scientific gravitas to their product. However, it’s important to note that their Basis product is really not unique. Many other companies sell nicotinamide riboside supplements, and resveratrol supplements have been available for years.
Welcome to “chemicals and society” a new feature at UYBFS where we highlight the current understanding of the biological effects and safety of some of the most common chemicals in today’s society.
What is Mercury? Mercury is an element with an atomic number of 80. While mercury is a metal, it is a liquid at room temperature, which makes it both really cool and really useful. Mercury exists in many different forms, and the form that it’s in makes a big difference: the different forms are used for different things, and their chemistry and toxicity varies greatly. Here are the major forms of mercury and their uses:
How are people exposed to mercury?
Welcome to Bad Science on the Internet! Here, we highlight some of the crazy and sometime dangerous stuff people post online, and then give you the facts.
The bad science: A recent article circulating around Facebook claims that the new flu vaccines don’t work and are actually dangerous because of new additives in the vaccines.
What do they claim? The main claims are that the new flu vaccines are not safe and that it’s less risky to skip the vaccine this year and risk the flu.
Are they trying to sell you something? Just the usual anti-vaccine conspiracy theory madness. This article was distributed on Facebook by a site called “Earth We Are One”, but there is no tag line identifying the author or even giving a date. It’s not clear who wrote this or why.
Is any of this true? It is actually amazing how little of this is true. Let’s go point-by-point!
