Yes we do, but in smaller quantities. According to this study (the only one I’ve found).
I took two courses in chemistry. I loved organic chemistry and hated redox reactions something fierce. I’m not the best person to ask.
Learn to code while playing Minecraft
“Our goal is to teach kids computer science while they’re having fun.”
Electric Fields Made Visible
Physics educator James Lincoln helps people understand the natural world. The gifs above are from a Youtube video he made on how to “see” an electric field, the region around a charged object where electric force is experienced. When the object is positively charged, electric field lines extend radially outward from the object. When the object is negatively charged, the lines extend radially inward.
Click the gifs for more info or see the full video below.
I’m sorry, I have a very conflicted relationship with my inbox and, the sad thing is, I can’t promise improvements for the future. But since it has threatened me with a hunger strike, I had to woman-up and pass a wall of cobwebs to start a thorough cleaning.
Generally, the eyes of nocturnal animals —like small cats— have multifocal lenses that allows them to increase contrast and depth of field in low light conditions. A circular pupil, contracting to protect the eye against bright light, would interfere with this type of structure (the iris shades the peripheral zones of the lens) leading to the loss of well-focused images. The slit pupils, therefore, may have developed in association with multifocal optical systems because more effective.
Vice versa, big cats are generally diurnal predators and they have monofocal eyes like us. So, their pupils tend to be circular because they are an adequate adaptation to monofocal optical systems.
NGC 2070 (30 Doradus, The Tarantula Nebula) in Dorado
In HaLRGB and Ha filters, and an annotated version.
The Tarantula Nebula (also known as 30 Doradus, or NGC 2070) is an H II region in the Large Magellanic Cloud (LMC).
The Tarantula Nebula has an apparent magnitude of 8. Considering its distance of about 49 kpc (160 000 light years), this is an extremely luminous non-stellar object. Its luminosity is so great that if it were as close to Earth as the Orion Nebula, the Tarantula Nebula would cast shadows. In fact, it is the most active starburst region known in the Local Group of galaxies.
It is also the largest such region in the Local Group with an estimated diameter of 200 pc. The nebula resides on the leading edge of the LMC, where ram pressure stripping, and the compression of the interstellar medium likely resulting from this, is at a maximum.
At its core lies the compact star cluster R136 (approximate diameter 35 light years) that produces most of the energy that makes the nebula visible. The estimated mass of the cluster is 450 000 solar masses, suggesting it will likely become a globular cluster in the future.