Greenland: Cradle of Life on Earth?
The mud volcanoes at Isua, in south-west Greenland, have been identified as a possible birthplace for life on Earth by an international team of geologists.
What's the Latest Development?
For the first time, scientists have identified the necessary requirements for life in a specific earthly environment. The mud volcanoes at Isua, in south-west Greenland, may have been where life first began on Earth some 3.8 billion years ago, say an international team of geologists. According to the scientists, the mineral serpentinite, which is often found in the walls of hydrothermal sources like ocen ridges and is plentiful in the area of Greenland they examined "could play a major role in the appearance of the first biomolecules."
What's the Big Idea?
Life is thought to have developed near to hydrothermal sources known as black smokers, such as those found at the bottom of the oceans along mid-ocean ridges. The abundance of hydrogen, methane and ammonia produced by these underwater geysers seemed favorable to the emergence of primitive life. Unfortunately, these black smokers are very acidic, which prevents amino-acid stabilization, and thus the formation of organic molecules. Scientists believe amino acids could have stabilized in the mud volcanoes of Isua.
Upstreamism advocate Rishi Manchanda calls us to understand health not as a "personal responsibility" but a "common good."
- Upstreamism tasks health care professionals to combat unhealthy social and cultural influences that exist outside — or upstream — of medical facilities.
- Patients from low-income neighborhoods are most at risk of negative health impacts.
- Thankfully, health care professionals are not alone. Upstreamism is increasingly part of our cultural consciousness.
The Bajau people's nomadic lifestyle has given them remarkable adaptions, enabling them to stay underwater for unbelievable periods of time. Their lifestyle, however, is quickly disappearing.
- The Bajau people travel in small flotillas throughout the Phillipines, Malaysia, and Indonesia, hunting fish underwater for food.
- Over the years, practicing this lifestyle has given the Bajau unique adaptations to swimming underwater. Many find it straightforward to dive up to 13 minutes 200 feet below the surface of the ocean.
- Unfortunately, many disparate factors are erasing the traditional Bajau way of life.
We explore the history of blood types and how they are classified to find out what makes the Rh-null type important to science and dangerous for those who live with it.
- Fewer than 50 people worldwide have 'golden blood' — or Rh-null.
- Blood is considered Rh-null if it lacks all of the 61 possible antigens in the Rh system.
- It's also very dangerous to live with this blood type, as so few people have it.
An innovation may lead to lifelike evolving machines.
- Scientists at Cornell University devise a material with 3 key traits of life.
- The goal for the researchers is not to create life but lifelike machines.
- The researchers were able to program metabolism into the material's DNA.
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