The Bonefish Reveals the Earth's Early Evolution of Vertebrates

Of course, this is not just about the story of fish. The small jawless fish lived on Earth a billion years ago. Its fossils can provide scientists with valuable information about the vertebrates in the early dawn of life on earth. Researchers announced on Wednesday that there were approximately 100 fish fossils unearthed in the Canadian Rockies and elsewhere. Fossils are well preserved and it is helpful to understand the origin of life and the original form of life by observing its body structure.


The fish, named Metaspriggina, lived in the Cambrian period of the Big Bang 500 million years ago. All signs indicate that this fish is one of the earliest vertebrates. The vertebrates that began with Metaspriggina include fish, amphibians, reptiles, birds and mammals and humans. The Metaspriggina escarpment has not yet had a person's thumb large, about 2 to one half inch (6 cm) long, with a small head, a narrow, conical body, a pair of big eyes on the top of the head and a pair of small nose pouches.

Children Face Mask

According to performance characteristics and scope of application, medical Masks can be divided into: medical protective masks, medical surgical masks, general medical masks.

Medical protective masks: Medical protective masks are suitable for the protection of airborne respiratory infectious diseases by medical personnel and related staff. Wear when in contact with airborne or droplet-borne respiratory infections. It can filter the particles in the air and block droplets, blood, body fluids, secretion droplets, etc. It is a disposable product. Medical protective masks can prevent most bacteria, viruses and other pathogens. WHO recommends that medical personnel use protective masks against particulates to prevent virus infection in the hospital air.

Kids Safety Mask,Children Face Mask,Kids Medical Mask,Kids Disposable Face Mask

BIQIAO MEDICAL TECHNOLOGY(HENAN) CO.,LTD , https://www.medical-technology.net

This entry was posted in on