Jellyfish is a common name for gelatinous water dwelling animals. The diversity of these invertebrates is amazing. And what actually counts as a jellyfish is not easy to determine. Watch this great video to learn about Cnidarians, Urochordata, Polychaetes and Ctenophores.
Related: Darwin’s Jellyfishes – Ocean Life – Critter Cam: Sea Lion versus Octopus – Image of Map Showing Concentration of Life in Oceans
A New, Somewhat Moldy Branch On The Tree Of Life
Biologists figure they’ve probably only cataloged about 10 percent of all fungal species. But they thought they at least knew all of the major groups.
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They found novel bits of DNA — related to fungi, but clearly different from all of the known varieties — just about everywhere, “including pond water, lake water, freshwater sediments and marine sediments,” Richards says. “Almost everywhere we looked we found this novel group.”
They then brought samples back to the lab and devised a technique to make the organisms containing this novel DNA glow under a microscope. As a result, they’ve managed to get a few glimpses of these mysterious life forms, which they have named cryptomycota.
“We know they have at least three stages to their life cycle,” Richards says. “One is where they attach to a host, which are photosynthetic algae. Another stage … they form swimming tails so they can presumably find food. And [there's] another stage, which we call the cyst phase, where they go to sleep.”
Science continues to explore and find new wonders around us. There is so much still to learn.
Related: Mycoremediation and its Applications In Oil Spills -Most Dinosaurs Remain Undiscovered – Iron-breathing Species Isolated in Antarctic for Millions of Years – Fungus-gardening Ant Species Has Given Up Sex Completely
Dark Matters from PHD Comics on Vimeo.
Great discussion and illustration of the state of our understanding of physics, matter, dark matter and the rest of the stuff our universe has from PhD comics. What is the universe made of? 5% of it is normal matter (the stardust we are made of), 20% dark matter and the other 75% – we have no idea!
Dark Cosmos is a nice book on some of these ideas. It is 5 years old so missing some of the latest discoveries.
Related: Why do we Need Dark Energy to Explain the Observable Universe? – The Mystery of Empty Space – Friday Fun, CERN Version
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A reader commented on a previous post (MIT Engineers Design New Type of Nanoparticle for Vacines) asking about how vaccines can fight cancer. Preventative vaccines can build up immune response to viruses which cause cancer. So the vaccine actually works against the virus which prevents the virus from causing cancer.
The U.S. Food and Drug Administration (FDA) has approved two vaccines, Gardasil® and Cervarix®, that protect against infection by the two types of human papillomavirus (HPV) – types 16 and 18 – that cause approximately 70% of all cases of cervical cancer worldwide. At least 17 other types of HPV are responsible for the remaining 30% of cervical cancer cases. HPV types 16 and/or 18 also cause some vaginal, vulvar, anal, penile, and oropharyngeal cancers.
Many scientists believe that microbes cause or contribute to between 15% and 25% of all cancers diagnosed worldwide each year, with the percentages being lower in developed than developing countries.
Vaccines can also help stimulate the immune system to fight cancers.
B cells make antibodies, which are large secreted proteins that bind to, inactivate, and help destroy foreign invaders or abnormal cells. Most preventive vaccines, including those aimed at hepatitis B virus (HBV) and human papillomavirus (HPV), stimulate the production of antibodies that bind to specific, targeted microbes and block their ability to cause infection. Cytotoxic T cells, which are also known as killer T cells, kill infected or abnormal cells by releasing toxic chemicals or by prompting the cells to self-destruct (a process known as apoptosis).
Other types of lymphocytes and leukocytes play supporting roles to ensure that B cells and killer T cells do their jobs effectively. These supporting cells include helper T cells and dendritic cells, which help activate killer T cells and enable them to recognize specific threats.
Cancer treatment vaccines are designed to work by activating B cells and killer T cells and directing them to recognize and act against specific types of cancer. They do this by introducing one or more molecules known as antigens into the body, usually by injection. An antigen is a substance that stimulates a specific immune response. An antigen can be a protein or another type of molecule found on the surface of or inside a cell.
Related: National Cancer Institute (USA) – Nanoparticles With Scorpion Venom Slow Cancer Spread – Using Bacteria to Carry Nanoparticles Into Cells – Global Cancer Deaths to Double by 2030
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As the writer of this blog (which is located at engineering.curiouscatblog.net) I am a strong believer in the importance of scientific literacy. Neil Degrasse Tyson stated the importance very well, as I mentioned in a previous post, the scientifically literate see a different world
The Financial Times has complied a list of the 10 things everyone should know about science
It is a challenge to create such a list. I agree with most of what they have. I would like to look at changing the last 2 and radiation, though. I would probably include something about the scientific method rather than statistical significance. Another area I would consider is something about bacteria and/or viruses. You can maybe include them under genes, but viruses and bacteria are amazing in the very strange things they do with genes and I think that is worthy of its own item. Another possibility is thinking of separating out a second spot for things related to the scientific method – causation, randomized testing, multivariate experiments… I would also consider one, or more of the following or something related to them biology – chlorophyll, the the life of bacteria in our bodies, something related to human health (how drugs work, medical studies…), etc..
The Ten Things Everyone Should Know About Science
The rate of evolution varies enormously between different types of organism and different environmental circumstances. It can proceed very quickly when the pressure is great, as, for example, with bacteria exposed to antibiotics, when drug-resistant mutations may arise and spread through the bacterial population within months.
Why does it matter? Evolution is coming under renewed assault, particularly in the US, from fundamentalist Christians who want creationism to be taught in schools. Although evolution has had virtually unanimous support from professional scientists for at least a century, polls show that American public opinion still favours creationism.
Related: Poor Results on Evolution and Big Bang Questions Omitted From NSF Report – Nearly Half of Adults in the USA Don’t Know How Long it Takes the Earth to Circle the Sun – Science Knowledge Quiz
The first scientists to describe Daphnia thought they were a kind of flea because they assumed the red color came from sucking blood as fleas do. It turns out they’re not bloodsuckers – they’re blood makers. Daphnia have genes that make hemoglobin, so when the animal is stressed out, those genes switch on and the animal looks red.
In fact Daphnia have an astonishingly large number of genes. “We count more than 31,000 genes,” says [John] Colbourne. By comparison, the human genome has more like 23,000 genes. If Guinness tracks such things, Daphnia would hold the record for the most genes of any animal studied to date.
“Many of those genes – we estimate around 35 percent of them – are brand new to science,”
Daphnia can grow its own spear and helmet when threatened by an attacker
Related: Our Genome Changes as We Age – Amazing Designs of Life – One Species’ Genome Discovered Inside Another Species – Bdelloid Rotifers Abandoned Sex 100 Million Years Ago
There are many values of science: letting our curious minds learn, giving us cool robots and gadgets and letting us learn about the past (and thus about the ever-changing world we live in).
Related: Ancient Whale Uncovered in Egyptian Desert – Rare Saharan Cheetahs Photographed – “Gladiator” tomb is found in Rome
Driver thanks man who hit him on purpose
Nice story and nice that the article had a tiny bit of science in the story, with another example of good work by an engineer.
Related: Nikola Tesla, A Scientist and Engineer – What is an Engineer? – Statistics Insights for Scientists and Engineers – Inspirational Engineer
More illusions by R Beau Lotto, lecturer in neuroscience, University College LondonThe middle tiles on the cube both have the same color, even though they appear very different to most of us.
The science of optical illusions
In this case the angles suggest depth and perspective and the brain believes the green table is longer than it is while the red table appears squarer.
The beautiful thing about illusions is they make us realise things are never what they seem, and that our experiences of the world shape our understanding of it.
Studying illusions can teach us several things. We can learn that it is easy for our senses to be fooled. We can learn about how the brain works. We can also learn how to take into account how our brain works to try and adjust our opinions (to be careful we are not just interpreting things incorrectly). It is amazing to see some of the wild guidance our brains give us. Normally they do a fantastic job of guiding us through our day but they have weaknesses that can lead us to mistaken conclusions.
Related: Albert Einstein, Marylin Monroe Hybrid Image – Why Does the Moon Appear Larger on the Horizon? – Illusions, Optical and Other – Seeing Patterns Where None Exists
Monarch butterflies eat toxic plants (that they have evolved to tolerate and make the butterflies themselves toxic to predators). They use medicinal plants to treat their offspring for disease, research by Emory biologists shows. When the butterflies are infected by certain parasites the butterflies have a strong preference to lay their eggs on a plant (tropical milkweed) that will help the caterpillar fight the parasite when it eats those leaves (it serves as a drug for them). Their experiments may be the best evidence to date that animals use medication.
Related: Monarch Migration Research – Monarch Butterfly Migration – Evolution at Work with the Blue Moon Butterfly
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Gravity and the Scientific Method
Posted on April 18, 2011 Comments (2)
One of the topics I return to repeatedly is the scientific method – theories must to tested. As evidence mounts that new ideas do a good job of explaining theories they become more accepted. But they continue to be tested in new ways as the ideas are extended and ramification are explored. And science progress means that old conventions can be overturned as new evidence is gathered.
Science is not about current beliefs. Science is about seeking knowledge. If the search for knowledge leads to evidence that old ideas were wrong those ideas are overturned. Since people are involved that process isn’t as clean as it sounds above. People get comfortable with beliefs. They build careers on expanding those beliefs. Most are uncomfortable when they are challenged and don’t accept new ideas even when the evidence mounts. But some do accept the new ideas. Some challenge the new ideas by running experiments. And some of those prove the new ideas faulty. Some become convinced of the new ideas as the results of their experiments make the new ideas seem more sensible (instead of getting the results they expected).
Building the body of scientific knowledge is not nearly as clean and simple as most people think. It isn’t a simple process, what is the underlying truth can be debatable. But the beauty of the scientific process is how it helps us overcome our biases and provide evidence to support the theories we support. The scientific method (combined with our human involvement) doesn’t mean new ideas are accepted easily but it does mean new ideas compete on the basis of evidence not just the power of those that hold the beliefs.
Is gravity not actually a force? Forcing theory to meet experiments
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Categories: Research, Science
Tags: commentary, curiouscat, experiment, gravity, physics, psychology, quote, Science, science explained, science facts, scientific inquiry