44 articles tagged with #astrobiology
On October 19, 2017, astronomers found the first object confirmed to have come from outside our solar system. It tumbled, looked extremely elongated or flat, showed no gas or dust, and still sped up slightly as it left the Sun. Scientists have proposed a hydrogen iceberg, a nitrogen shard, and an alien lightsail. Here is what the evidence supports.
The Miller-Urey experiment made amino acids from scratch in 1953. Learn the apparatus, the 2008 reanalysis that found 22 amino acids, and today's atmosphere debate.
Astrobiology covers extremophiles, habitability criteria, biosignatures, candidate worlds (Mars, Europa, Enceladus), the Drake equation, and the Fermi paradox.
The Drake Equation estimates how many alien civilizations exist in the Milky Way. Learn each factor, the modern numbers, and what it actually tells us.
Olympus Mons on Mars: 21.9 km tall, 600 km base diameter, fed by a stationary hotspot for 4 billion years. Why Mars's gravity and lack of plate tectonics enable giants.
From Sojourner to Perseverance, every Mars rover explained — missions, discoveries, and the race to bring samples back to Earth.
What would happen if every drop of water on Earth vanished? Explore the catastrophic consequences for life, atmosphere, and planet.
A thought experiment on alien biology, first contact protocols, and Fermi paradox resolutions — what discovering extraterrestrial life would really mean.
Daily life on Mars: 38% gravity, radiation, blue sunsets, regolith homes, hydroponic food, and the psychology of 22-minute light-lag from Earth.
How did chemistry become biology? Origin of life explained: Miller-Urey, the RNA world, hydrothermal vents, LUCA, and the questions science has not settled.
If Earth's rotation halted for good, one side would bake into permanent desert, the other would freeze into an ice sheet, and a thin twilight ring could be the only place left to farm.
AI is already scanning billions of radio signals, analyzing atmospheric data, and searching exoplanet spectra. What happens the day it finds something that shouldn't be there?