6 of the Longest-Running Science Experiments Ever Conducted

The Dark-Fly Experiment

• 🔬 Fruit flies were raised in complete darkness for over 60 years, spanning approximately 1,500 generations.
• 💡 Researchers observed adaptations such as improved light sensitivity and enhanced reproduction in dark environments.
• 🧬 Dozens of genes were identified as potentially responsible for these genetic adaptations to prolonged darkness.

The Pitch-Drop Experiment

• 💧 This experiment, started in 1930, demonstrates the extreme viscosity of pitch, a fluid that appears solid at room temperature.
• ⏳ In 95 years, only 9 drops have fallen, with most occurring unobserved due to their slow rate.
• 🔴 A livestream is ongoing to capture the 10th drop, which could occur at any moment.

The Centennial Bulb

• 💡 Installed in 1901, this incandescent light bulb has been continuously burning for 124 years, becoming a symbol of planned obsolescence.
• ⚙️ Unlike modern bulbs designed to fail after 1,000 hours, this carbon-filament bulb's longevity remains a mystery, despite scientific analysis.
• 🔋 It now glows at approximately 4-watts, having significantly reduced its output over time.

Beal Seed Experiment

• 🌱 Initiated in 1879, this experiment tests seed dormancy, with bottles of seeds unearthed at increasing intervals.
• ✅ Remarkably, seeds from various types have germinated every time, demonstrating that seeds can remain viable for over 140 years.
• 🏦 This research is crucial for understanding seed banks and preserving genetic material.

The Oxford Electric Bell

• ⚡ Operating since 1840, this bell has rung continuously for 185 years, powered by a dry-pile battery.
• 🔋 The battery's composition is unknown, but it likely consists of alternating layers of metal foil and paper coated with manganese dioxide.
• ⏳ The bell's continuous operation highlights the long-term potential of early chemical battery technology.

The 500-Year Experiment

• 🦠 This experiment, begun in 2014, aims to test the viability of desiccated microbes over five centuries.
• 🔬 Researchers are observing how molecules like lipids, protein, and DNA degrade over extended periods in dried bacteria.
• 🚀 Findings could have significant applications in astrobiology, drug storage, and space travel, with initial results showing no significant viability decrease in the first few years.