Lazzaro Spallanzani

They worked on disproving spontaneous generation. Also known as abiogenesis, spontaneous generation is the belief that living things could arise from nonliving things. Worms and flies were often seen on decaying meat, which led many to believe that that’s where they originated from. Francesco Redi was the first out of the three to try and disprove this theory. He proved that flies and maggots do not come from rotting meat, but from the eggs laid on the meat. His experiment, however, did not turn heads. People still believed in spontaneous generation. John Needham did an experiment that showed microorganisms ‘growing’ from heated broth. Lazzaro Spallanzani did an experiment of his own and found the exact opposite results as Needham. He reported 1765 that broth did not create living things. Finally, Louis Pasteur was the one to deliver that final blow that disproved spontaneous generation once and for all. He proved that spores in the air caused organisms to grow in broth. Perseus the Hero, a constellation found in the northern hemisphere, was first charted by Ptolemy in the second century. In Greek mythology, Perseus was the son of Zeus. Perseus is most famous for killing Medusa the Gorgon with Pegasus. Perseus also is known for saving. Princess Andromeda from Poseidon's sea monster Cetus. Perseus directly borders the constellations Andromeda, Cassiopeia, and Cepheus, who all make…

Ultrasound has been used for many years to help diagnosis. Ultrasound describes sound frequencies beyond the range of normal human hearing and 20 kilohertz. Ultrasound uses focused low-energy ultrasound waves to visualize the interior of the body in a noninvasive and painless way. Many people are to thanks for the evolution of ultrasound. Dating back to the 1700’s. Lazzaro Spallanzani in 1793 observed that bats function efficiently in the dark, even when blinded, but not if deafened. He…

was theorized by the citizens at the time that Henry IV, King of Castile, who was known as being impotent had completed an artificial insemination on his wife. When his Queen had a child after six years of marriage and a previous annulment as a result of his impedance the idea of artificial insemination was brought up. Unfortunately, later on the queen claimed that the child was not his. The development of artificial insemination had then reached a stand still as spermatozoa was not officially…

patient. Once the energy is inside the patient the structures reflect and distribute the sound which creates an echo. This echo is what allows us to produce an image of the structures of concern within our patients. Diagnostic ultrasound is a very complex procedure which leads us to wonder is it safe. This topic is one of great debate, because ultrasound is such a new technology sufficient studies have not been able to be produced. With that in mind we will review the history of sonography, the…

The Pros of Ultrasound When it comes to pregnancies, one never knows what to expect. The experience can be exhilarating yet distressing. Will the baby be prone to Down syndrome? Will a cesarean section be needed? The use of ultrasound date back to 1794, Lazzaro Spallanzani, a physiologist was the first to study ultrasound physics by deducing bats using them to navigate by echolocation. In 1826, Jean Daniel Colladon used an under-water Church Bell (early ultrasound “transducer”) to calculate the…

deadly microorganisms, scientists can find cures and save lives. Microbes were thought to be the first living organisms on earth, but it wasn’t until the mid-1600’s that they were noticed. In this century, Antonie van Leeuwenhoek invented the first microscope. Atlas said, “These microscopes were really simple, consisting of spherical glass lens held by two metal plates, a specimen holder, and screws for positioning and focusing the specimen” (Atlas 5). Using his microscope, Leeuwenhoek sent…

Deep-Biosphere endoliths can be found deep within the ocean floor. These areas are either extremely hot, or extremely cold, which makes deep-biosphere endoliths thermophiles or psychrophiles as well. These organisms not only deal with extreme temperatures, but also intense pressures, which generally could categorize them as barophiles as well (Bruckner 2012). The most extreme, the toughest, and the most indestructible animal on the planet is believed to be the Tardigrade. It was discovered…