What $50 Billion Of US Science Really Looks Like

Key Concepts

• Specimen Acquisition and Preservation: Methods for collecting, preserving, and storing biological and geological specimens for scientific research.
• DNA Extraction and Analysis: Techniques for obtaining and analyzing genetic material from specimens.
• Fossil Excavation and Preparation: Processes involved in discovering, cleaning, and stabilizing fossils.
• Biodiversity Documentation: Efforts to catalog and understand the variety of life on Earth.
• Environmental DNA (eDNA): Genetic material shed by organisms into their environment, used for ecosystem monitoring.
• Volcanology and Lava Studies: Research into lava flow behavior, composition, and prediction.
• DNA Phenotyping: Using genetic information to predict physical appearance for forensic purposes.
• Museum Collections: The role of museums in housing and providing access to vast scientific collections.
• Scientific Research Funding: The impact of government shutdowns and funding on scientific institutions.

Specimen Acquisition, Preservation, and DNA Analysis

Museums and labs acquire specimens through donations or by researchers collecting them in the field. For example, the Field Museum strategically euthanizes specimens like common water snakes for research. A crucial first step with new specimens is DNA extraction. This process is easier with fresh samples, as DNA from preserved specimens can be harder to retrieve with good results.

DNA Extraction Process:

1. Sanitization: Tools (scissors, forceps) are sanitized by burning off random DNA to prevent contamination. They are then dipped in ethanol to cool them and prevent searing the animal.
2. Tissue Sample Collection: Samples are taken from the inside of the animal to preserve external appearance. The liver is a preferred tissue for DNA extraction due to its ease of dissolution.
3. Labeling and Storage: Samples are meticulously labeled (e.g., SR1291) and stored in massive liquid nitrogen freezers.

Preservation Techniques:

• Formalin: Used to preserve tissue and fix specimens in time, akin to embalming. Researchers must consider current and future information needs, such as the sex of the snake, and may pose specimens for visibility of certain features (e.g., hemi-penes). Specimens are soaked in formalin-soaked paper towels to maintain saturation. Over days, formalin sets, fixing the specimen.
• Alcohol Baths: Used for long-term preservation after formalin treatment. Alcohol is less toxic than formalin and safer for researchers. Discoloration in alcohol baths can occur due to debris and fatty oils leaching from larger specimens.
• Clearing and Staining: For smaller fish, tissues can be cleared to reveal skeletons and cartilage.
  1. Blue Dye: Applied to stain cartilage.
  2. Red Dye: Applied to stain calcium in bones.
  3. Trison Enzyme: Used to digest proteins, making the fish transparent while preserving collagen.
  4. Final Red Dye: Bones are dyed red. These transparent specimens are stored in glycerin due to its similar refractive index to collagen, allowing for microscopic examination of skeletal structures. This method has led to the discovery of new species, such as two fish species that appear identical externally but have skeletal differences.

Specimen Management and Discovery:

• Cataloging and Organization: Specimens are organized like a library, with families, genera, and species arranged systematically. A database includes fields for tracking specimen location and last seen date.
• Challenges in Retrieval: Locating specific specimens can be challenging, especially in large collections with many similar items (e.g., 883 frogs in one jar). Combining specimens from different sources can exacerbate retrieval issues.
• Value of Old Specimens: Older specimens are valuable, and techniques are being developed to recover DNA from them, though success rates can vary (0-70%).

Fossil Excavation and Analysis at La Brea Tar Pits

The La Brea Tar Pits in Los Angeles preserve fossils for 25,000 to 45,000 years, contributing to a 50,000-year timeline of life in the region.

Excavation Process:

1. Site Identification: The process begins with identifying excavation pits, which contain asphalt, not tar. Some pits are active and connected to oil sources, while others have dried out.
2. Grid Setup: A grid is established to meticulously track the location and position of fossils.
3. Meticulous Excavation: Due to the density of asphalt, visual inspection and careful excavation with small tools (dental picks, brushes) are employed. The asphalt protects organic matter, making bones fragile.
4. Matrix Removal: Chemical degreasers (e.g., NOVc 73DE) are used to dissolve asphalt, revealing fossils and microfossils.
5. Preparation: Extracted fossils undergo further cleaning with degreasers, cotton swabs, foam applicators, and brushes. Some matrix is left for structural support.
6. Repair and Stabilization: Damaged or fragmented fossils are repaired using adhesives and archival Japanese koso paper, which anchors well to the specimen. The entire specimen is then sealed with adhesive for protection, with the process being reversible with acetone.

Significance of La Brea Collections:

• Timeline of Life: The collection provides a detailed record of life in the region, crucial for understanding extinction events like the Ice Age extinctions (which began 12,000 years ago).
• Understanding Extinction: Fossils help researchers investigate the causes of extinction, such as water scarcity, temperature changes, fire, or human impact.
• Behavioral Insights: Unique specimens, like a saber-tooth cat with hip dysplasia, suggest social behavior within species, as individuals with injuries would have relied on group support.
• Climate Change Research: Studying how past species adapted to climate change can inform strategies for navigating current extreme conditions.

Smithsonian National Museum of Natural History Collections and Research

The Smithsonian National Museum of Natural History houses over 148 million specimens, with the majority stored in secure collections.

Specimen Acquisition:

1. Donations: Significant items, like an 8,000lb crystal from Arkansas, are acquired through donations.
2. Expeditions: Scientists collect samples from the field.
3. Purchases: This is rare due to budget limitations, requiring private funding.

Preservation and Storage:

• Wet Collection: Tiny jars and large vats hold creatures like stonefish.
• Fossil Preparation: Fossils are painstakingly removed from matrix.
• Bird Specimen Preparation: Muscles and soft tissues are removed to ensure longevity.
• Carnivorous Beetles: Used to clean recently living creatures, reaching small nooks and crannies.
• Digitization: Millions of items are being 3D scanned and digitized to create a "digital Noah's Ark." This includes the entire US herbarium (over 5 million plants) and the entomology collection.

Research Applications:

• Real-World Problems: Collections are used to solve problems like helping planes avoid birds and protecting against invasive species (e.g., murder hornets).
• Feather Identification Lab: Identifies bird remains from aircraft strikes ("snarge") to help airports develop wildlife control programs. DNA analysis is crucial when physical identification is uncertain.
• Genetics and Genomics: The Laboratories of Analytical Biology (LAB) document life on Earth using genetics. Mapping genomes of species (e.g., North American birds) aids identification and understanding of genetic diversity.
• Earth Biogenome Project: A global effort to map the genome of every species on Earth, aiming to unlock benefits for human civilization and discover new species.
• Environmental DNA (eDNA): Genetic material from water or soil samples is analyzed to understand ecosystems and detect invasive species.
• Autonomous Reef Monitoring Structures (ARMS): Devices deployed to collect marine life, with subsequent analysis of eDNA from scraped plates to identify species and ecosystem health.
• Conservation: Collections are vital for species conservation, especially for those on the brink of extinction.
• Agriculture: Insect and botany collections are used to identify potential agricultural pests.
• Invasive Species Detection: The identification of the Northern Giant Hornet (Vespa mandarinia) highlights the critical role of collections in detecting and responding to invasive species that threaten agriculture and ecosystems.

Challenges and Future:

• Funding Cuts and Political Pressure: Museums face financial and political challenges that risk these scientific resources.
• Private Collectors: The increasing cost and demand for specimens, particularly fossils and crystals, make it difficult for museums to compete.
• Extinction is Forever: While private companies may promise to reverse extinction, real ecosystems cannot be replaced.
• Urgency of Research: Advanced technology allows for excellent genome sequencing from old specimens, making it urgent to answer critical scientific questions.

The Crystal Trade and Museum Collections

The gem and mineral department faces challenges in acquiring specimens due to the booming crystal market.

Crystal Acquisition and Value:

• Donations: Historically, significant donations like an 8,000lb Arkansas quartz crystal were crucial.
• Rising Costs: Crystals have become increasingly expensive, with prices skyrocketing due to scarcity, growing demand, and aesthetic appeal.
• Private Collectors: Wealthy private collectors are acquiring a majority of high-quality specimens, making it difficult for publicly funded museums to compete.

The Arkansas Quartz Crystal:

• Discovery: A massive quartz crystal was discovered by a fifth-generation miner, Josh Coleman, and his grandfather.
• Preparation: The crystal required extensive cleaning and careful extraction over two months.
• Tucson Gem Show: The crystal was displayed and sold at the Tucson Gem Show, the world's largest, where an estimated $5 billion worth of crystals are sold annually.
• Donation to Smithsonian: Real estate developers Michael and Patricia Burns purchased the crystal and donated it to the Smithsonian, recognizing its value as an "American treasure for the American public."
• Transportation and Installation: Moving the 5,000lb and 3,000lb crystal pieces to Washington D.C. was a complex logistical operation involving specialized equipment and a team of riggers.

Historical and Cultural Significance of Crystals:

• Antiquity: Crystals have been used since ancient times for jewelry, burial rituals, and medicinal purposes.
• Metaphysical and Wellness Trends: The popularity of crystals has surged with metaphysical and wellness movements, driven by celebrities and social media.
• Scientific vs. Spiritual Value: While there is no scientific evidence for the healing power of crystals, their perceived spiritual and aesthetic qualities drive demand.

Preservation and Access:

• Museums vs. Private Collections: Museums ensure specimens are preserved for public display and scientific research, whereas private collections are not publicly accessible.
• Rarity and Formation: Crystals form under specific geological conditions over millions of years, making them rare and valuable.

Dinosaur Paleontology: Warm-Bloodedness and Soft Tissue Preservation

Research at the Field Museum is shedding new light on dinosaur physiology, particularly their warm-bloodedness.

Histological Analysis of Fossils:

• Destructive Analysis: Rare fossil fragments are used for destructive analyses, such as slicing or dissolving in acid, to answer specific research questions.
• Thin Sectioning: Dinosaur bones are sliced into extremely thin sections (30-80 microns) to be studied under a microscope. This process involves embedding the bone in resin, grinding, and polishing.
• Growth Rings: Analysis of bone sections, like Sue the T-Rex's rib, reveals lines of arrested growth, indicating rapid growth rates and a high metabolic rate, suggesting warm-bloodedness.

Melanosome Analysis:

• Color Indicators: Melanosomes, organelles responsible for color, fossilize and leave behind distinct shapes that indicate specific colors (e.g., oval for gray, "meatball" shaped for rusty red, "sausage" shaped for iridescent black).
• Metabolism Link: The diversity of melanosome shapes and sizes in fossil birds (like Confuciusornis) suggests a higher metabolism compared to modern cold-blooded lizards. Genes responsible for melanosomes are also linked to metabolism.

Soft Tissue Preservation and Analysis:

• Paradoxical Preservation: Soft tissues (skin, blood vessels) can preserve in fossils, a phenomenon that was once considered impossible.
• Demineralization: Hydrochloric acid is used to dissolve inorganic rock, isolating organic soft tissues.
• Microscopic Examination: Structures like blood vessels and extracellular matrix can be identified under a microscope.
• Raman Spectroscopy: A non-destructive technique using a laser to excite chemical bonds in organic materials. The resulting spectrum reveals the molecular composition, indicating metabolic stress markers.
• Warm-Bloodedness Evidence: The presence of high amounts of specific metabolic stress markers in soft tissues of dinosaurs like Sue the T-Rex provides definitive proof of warm-bloodedness, challenging previous assumptions about dinosaur physiology. This suggests that high avian metabolism is not an avian innovation but an ancestral dinosaur trait.

Studying Lava Flows: Lab and Field Research

Scientists study lava flows through both controlled laboratory experiments and direct field observations to understand their behavior and predict their impact.

Laboratory Simulation (Syracuse University Lava Lab):

• Personal Volcano: A large furnace (tilt furnace) capable of melting up to 800 lbs of basaltic rock is used to create artificial lava.
• Temperature Control: The furnace operates between 2,000 and 2,400°F, with experiments targeting a specific lava temperature range of 1,600 to 2,200°F.
• Protective Gear: Scientists wear specialized aluminum suits that can withstand radiant heat up to 3,000°F, including helmets with gold-plated visors for reflection.
• Data Collection: Multiple digital cameras capture 3D images of the flow, and a thermal camera measures temperature.
• Viscosity Measurement: Viscosity, a key property controlling eruptive style and flow appearance, is directly related to temperature. Hotter lava is less viscous.
• Variable Testing: The lab allows researchers to study how factors like metal and crystals affect lava cooling rates and viscosity.

Field Research:

• Direct Sampling: Scientists collect samples from active lava flows in the field, often in extreme conditions (e.g., 30-60°C ambient temperature near a lava river).
• Sampling Tools: Rock hammers or iron bars are used to collect samples, which are then rapidly cooled in water to preserve crystal content and size.
• Temperature Measurement: Handheld thermal cameras or multi-channel data loggers with thermal probes are used to record temperatures. Probes can be lost in the flow.
• Drone Technology: Drones equipped with thermal cameras, regular cameras, or gas sensors are revolutionizing volcano observation, acting as platforms for mapping and ash collection.
• Importance of Field Data: Field data provides essential real-world context and is crucial for understanding natural phenomena where repeatability is impossible.

Connecting Lab and Field:

• Systematic Testing: Lab experiments allow for controlled variation of parameters to isolate cause and effect, complementing the unpredictable nature of field observations.
• Predicting the Unpredictable: Both approaches aim to improve the ability to predict lava flow behavior and ensure public safety.

DNA Phenotyping for Forensic Identification

DNA phenotyping is an emerging technology that uses genetic information to predict an individual's physical appearance, aiding in criminal investigations.

Methodology:

1. DNA Phenotyping: Combines forensic sculpture (using skull remains and population samples) with DNA phenotyping.
2. Genetic Ancestry and Traits: Algorithms analyze ancestry and specific genetic markers (single nucleotide polymorphisms or SNPs) associated with facial features, hair color, and eye color.
3. Database Development: Researchers build databases of genetic information and corresponding physical traits from diverse populations.
4. Facial Reconstruction: The algorithm generates a predicted facial image based on the individual's DNA and the collected data.

Process and Data Collection:

• SNP Analysis: Identifies variations in base pairs that influence traits. For example, specific base pairs are associated with brown/hazel eyes versus blue/green eyes.
• Phenotype Data: Researchers collect measurements and data on physical characteristics (phenotypes) from individuals to inform the algorithm. This includes hair type, facial features, skin pigmentation, and body composition.
• Hair Analysis: Cross-sectional analysis of hair examines its shape, thickness, and the presence of a medulla, providing objective forensic data beyond racial categorization.
• Skin Pigmentation Measurement: Melanin levels in different skin areas are measured.
• Body Composition: Scales measuring weight and BMI provide data on body shape.
• 3D Facial Imaging: Photographs taken from multiple angles are used to create a 3D model of the face, accounting for how gravity affects facial structure.

Challenges and Limitations:

• Accuracy: The technology is still developing, and predicted faces are not exact matches. The algorithm works best for statistically average individuals.
• Data Requirements: The accuracy of predictions depends on the size and diversity of the genetic and phenotypic databases.
• Trait Predictability: Not all traits are predictable from DNA alone. Many are influenced by multiple SNPs or environmental factors.
• Environmental Factors: Identical twins can have different appearances due to environmental influences (e.g., sun exposure).
• Premature Deployment: Concerns exist about the premature use of this technology in investigations before it is fully validated, as discrepancies between predicted and actual faces could mislead investigators.
• Ethical Considerations: Understanding the limitations of DNA phenotyping is crucial for its appropriate and ethical application in forensic science.

Future Potential:

• Improved Accuracy: Continued data collection and algorithmic refinement are expected to increase accuracy.
• Broader Applications: The technology has the potential to provide crucial leads in cases involving unidentified remains, helping to identify victims and solve crimes.

Conclusion

Museums and scientific institutions are vital hubs for acquiring, preserving, and analyzing specimens, driving scientific discovery and contributing significantly to the economy. From the meticulous preservation of biological specimens and the painstaking excavation of fossils to the cutting-edge analysis of DNA and the simulation of geological phenomena, these institutions are at the forefront of understanding life on Earth. The ongoing digitization of collections, the development of advanced analytical techniques like DNA phenotyping and eDNA analysis, and the dedication of researchers in the field are crucial for addressing pressing global challenges, from climate change and biodiversity loss to forensic investigations and public safety. However, these efforts are increasingly threatened by funding challenges and the competitive market for specimens, highlighting the critical need for continued investment and support for scientific research and preservation. The knowledge gained from these collections is not merely historical; it is foundational for shaping a sustainable and informed future.