November 3, 1957: Sputnik 2 Carries Laika Into Orbit — the First Animal in Space, and a Sacrifice

On November 3, 1957 — one month after Sputnik 1 shocked the world — the Soviet Union launched Sputnik 2, a cone-shaped spacecraft carrying a small dog named Laika. She became the first living creature to orbit the Earth, proving that a body could survive launch and weightlessness. Her story, long hidden, remains the most poignant chapter of the space race.

Laika, the Moscow Stray

Laika — “Barker” in Russian, though she was also called Kudryavka, “Little Curly” — was a two-to-three-year-old stray picked up from the streets of Moscow. Soviet scientists preferred strays: they were hardier, accustomed to hunger and cold, and calmer under stress. She was trained alongside two backup dogs to sit in a cramped cabin, wear a harness, accept gel food and endure simulated launch noise and centrifuge spins. The spacecraft itself was a feat of rapid engineering: Sputnik 2 weighed 508 kilograms, carried life-support systems, and included a TV camera so ground controllers could watch their passenger.

A Flight Without a Return

The mission was designed as a one-way trip. Soviet engineers had not yet solved atmospheric re-entry, and the launch was rushed to coincide with the anniversary of the October Revolution. Laika’s cabin included a gel food dispenser and a waste-collection system; sensors monitored her heartbeat and breathing. Early Soviet accounts claimed she lived for days, then was euthanized with poisoned food when oxygen ran low. The truth, revealed in 2002, was harsher: Laika died within hours of launch — likely from overheating when the thermal control system failed. Sputnik 2 orbited for five months before burning up in the atmosphere in April 1958.

The Debt of Every Astronaut

Laika’s flight was a necessary proof: life could leave Earth. Yuri Gagarin, less than four years later, was possible because a Moscow stray went first. The world was told a gentler version; only decades later did Russia erect a monument to Laika at the Star City cosmonaut training center — a dog standing atop a rocket, finally honored. Animal flights continued on both sides for years. On November 3, 1957, humanity crossed a threshold, and the first passenger through the door could never come home.