# De-Extinction & Resurrection Biology: Pros and Cons
> Explore the science of de-extinction, including CRISPR editing, key candidates like the Woolly Mammoth, and the ethical debate over biodiversity loss.

Tags: de-extinction, resurrection-biology, biodiversity, crispr, genetic-engineering, conservation, woolly-mammoth
## DE-EXTINCTION: RESURRECTION BIOLOGY
- Overview of the future of biodiversity and the ethical debate surrounding the resurrection of extinct species.

## THE URGENCY: BIODIVERSITY LOSS
- Highlighting the IPBES 2019 report on accelerating extinction rates.
- Data shows 40% of amphibians, 33% of reef corals, and 33% of marine mammals are threatened.

## WHAT IS DE-EXTINCTION?
- Definition: Creating organisms that resemble or are functional equivalents of extinct species.
- Also known as Resurrection Biology.

## HOW IT WORKS: THE SCIENCE
1. **DNA Recovery**: Genetic material extraction from fossils.
2. **CRISPR Editing**: Modifying the genome of close living relatives.
3. **Surrogate Parenting**: Using living mothers for embryos.

## KEY CANDIDATES
- Woolly Mammoth
- Tasmanian Tiger
- Passenger Pigeon

## PROS: ECOSYSTEM & SCIENCE
- **Restoration**: Mammoths could convert tundra to grassland, preserving permafrost.
- **Advancement**: Development of 'Genetic Rescue' tools (e.g., Black-footed Ferret rescue).

## CONS: HABITAT, DISEASE & ETHICS
- Loss of original habitats due to human development.
- Risk of ancient pathogens and invasive species effects.
- **Resource Allocation**: High costs vs. funding for living endangered species.

## NATURAL VS HUMAN-CAUSED EXTINCTION
- **Natural**: 1-5 species/year.
- **Human-Caused**: Rates are 1,000x higher than background (Ceballos et al., 2015).

## SUMMARY
- Pros: Restores ecosystems, advances science, fixes past mistakes.
- Cons: Animal suffering risks, funding diversion, ecological unpredictability.
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