Inside the Ice Man, Dark Matter Mystery, and Fukushima Cleanup

TL;DR

Scientists have sequenced the genome of the 5300-year-old Iceman, revealing that he had a difficult life and was the earliest known carrier of Lyme disease. Astronomers are puzzled by a galactic cluster that left a core of dark matter behind after a collision. One year after the Fukushima nuclear disaster, there are still questions about the disposal of the massive amounts of radioactive waste.

Transcript

hello and welcome back to my office where this week I want to throw three bite-sized bits of news at you let's start with everybody's favorite 5300 year old Iceman Etsy whose well-preserved body was discovered in 1991 by hikers in the Swiss Alps scientists announced in Italy this weekend that they had sequenced Etsy's entire genome and it turns out... Read More

Key Insights

• 🧑‍⚕️ The Iceman's genome sequencing provided insights into his physical traits, health conditions, and ancestral connections.
• 🕶️ Dark matter remains puzzling to astronomers, as observations of the galactic cluster Abel 520 showed that galaxies sailed away from the dark matter core after a collision.
• 🗑️ Fukushima's nuclear waste disposal remains a significant challenge, with massive amounts of radioactive waste requiring a long-lasting disposal facility.
• 🧑‍⚕️ Cesium-137 contamination from Fukushima poses health risks due to its long half-life and ability to be absorbed by various body cells.
• 🧬 The Iceman's genome sequencing highlights the advancements in ancient DNA analysis.
• 🕶️ The remaining core of dark matter challenges current understanding of galactic collisions and behavior of dark matter.
• 🌗 Fukushima's nuclear waste illustrates the long-lasting consequences of a major nuclear disaster.

Questions & Answers

Q: What new insights did scientists gain from sequencing the Iceman's genome?

By sequencing the Iceman's genome, scientists learned about his physical appearance, health conditions, and common ancestry with inhabitants of certain islands. They discovered his brown hair, brown eyes, Type O blood, predisposition to heart disease, lactose intolerance, and being the earliest known carrier of Lyme disease.

Q: Why are astronomers perplexed by the remaining core of dark matter after a galactic collision?

Astronomers expected dark matter and galaxies to remain bound together even after a collision. However, in the case of the galactic cluster Abel 520, the galaxies sailed away from the dark matter, leaving a core behind. This observation defies the scientists' understanding of dark matter behavior.

Q: What are the concerns regarding the disposal of radioactive waste from Fukushima?

One year after the disaster, there are still questions about the handling of the massive amounts of radioactive waste. Estimates suggest it amounts to 90 million cubic meters, primarily consisting of iodine-131 and cesium-137. The challenge lies in building a disposal facility that can last for an extended period due to the long half-life of cesium-137.

Q: What are the potential health effects of cesium-137 contamination?

Unlike iodine-131, which has a short half-life, cesium-137 has a half-life of over 30 years. It can be taken up by various body cells and can cause a wide range of health effects, from nausea to cancer. This radiation sickness is a significant concern associated with cesium-137 contamination.

Summary & Key Takeaways

• Scientists have sequenced the genome of the Iceman, revealing his physical traits, health conditions, and common ancestry with present-day inhabitants of certain islands.

• Astronomers are perplexed by a galactic cluster that left a core of dark matter behind after a collision, defying their understanding of how dark matter and galaxies should behave.

• One year after the Fukushima nuclear disaster, there are concerns about the disposal of the massive amounts of radioactive waste, primarily consisting of two radioactive isotopes.