Other than humans, there is only one animal that we know about that talks about events that have already happened (the past): Orangutans. Orangutans make a certain sound to signal that there is a predator nearby. Scientists have observed orangutans seeing a predator, quietly climbing to safety while carrying her infant, and waiting until it was safe to give the warning.
This delayed warning makes it safer for the infant, and indicates a greater intelligence than only communicating about events that are currently happening.
“The mother saw the predator as most dangerous to her youngster and chose not to call until it was gone,” he says. Then, and only then, did she provide information, letting the infant learn about the danger that had passed, the team reports today in Science Advances.
According to this article at The Guardian, the Dutch have done a trial with 50 subjects with type 2 diabetes underwent an hour-long procedure that involved destroying the mucus membranes of the small intestine (probably not the whole small intestine, most likely the jejunum). In 2 weeks the body replaces the missing mucus membrane. After 1 year, 90% of patients still have stable blood sugar levels. It’s unknown yet if this can be a permanent treatment, or if the procedure needs to be repeated regularly.
Helium is a very strange beastie. With most elements, if you cool it down enough, it will turn into a solid. The molecules will slow down, and then lock into place. But helium does very strange things when you cool it down enough, including refusing to solidify as you approach absolute zero.
Of course, this is all the fault of quantum mechanics, which has the somewhat annoying property of being totally counterintuitive and also matching all experiments to see whether it’s true or not. At the atomic level, things are just weird.
Some of the weird things that helium does when you get it cold enough, cold enough to turn it into a superfluid, are: climb up walls, fit through microscopic cracks that it can’t fit through as a regular liquid, and make a superfluid fountain.
Do you like to read? I love to. But many people don’t. It may just be that they weren’t taught properly how to read.
People are born wired to talk and communicate. But not to read.
Another big takeaway from decades of scientific research is that, while we use our eyes to read, the starting point for reading is sound. What a child must do to become a reader is to figure out how the words she hears and knows how to say connect to letters on the page. Writing is a code humans invented to represent speech sounds. Kids have to crack that code to become readers.
The best way to learn is to associate the sounds of words: phonics. When you know how to sound out a word, you can connect the written word to the word you already know. This makes it easier to read. But for a very long time, reading education was based on the belief that learning to read is natural. It’s not, and we have to change the way we teach kids how to read.
Of course, here on Earth, it’s the bowling ball. But why?
The answer is air resistance. Those darn air particles slow down the low mass feathers. They try to slow down the high mass bowling ball, but have little effect. So the feathers take longer to fall.
But what if you could remove those pesky air particles? Well, they did this on one of the later Apollo missions, but you can also do this on Earth. If you have the right equipment. Fortunately, NASA does.
This episode of Because Science explains why speedsters like The Flash are impossible.
I’m not dissing The Flash here, he’s one of my favorite supers. But sadly, he’ll have to remain in the realm of fiction.
If people would just actually think instead of parroting back conspiracy theories … Sheesh!
Anyway, here’s a good video on 20 different things that victims of the flat earth virus just can’t answer:
This video by Trans.MISSION explains how we know that climate change is real and recent. It’s a good entry-level video.
There have been lots of pictures of black holes, it’s just that they aren’t really pictures—they’re illustrations, or computer generated. Since no light can leave a black hole, you can’t ever see anything from inside the event horizon.
Here’s a good article on Vox showing what we’ve actually seen from black holes, and what we might see after the Event Horizon Telescope project gets setup.
This seems like a very simple question. But as this video from vsauce shows, it’s anything but. This goes into things way past my middle school classroom, including general relativity, spacetime, and geodesics. Things are simplified in middle school, and it’s still a difficult thing for kids to get. More below the video.
In middle school we’re more interested in the Newtonian view rather than the spacetime view. For us, down is towards the center of the Earth. It’s the same for people on the other side of the Earth (say in Australia (I’m in New Jersey, USA)). For them, down is still towards the center of the Earth, but that’s in a different direction. My down and their down point in close to opposite directions. That’s because the concept of “down” is a local direction, not a universal one. My down is different from the down of my friend who lives in New Zeeland. This can be a difficult thing for 13 year olds to understand. It helps to show it on a globe, with little stick figures drawn on a folded up sticky notes.