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1960

Science20th CenturyRussia & Central Asia

Sputnik 5 Returns Animals from Orbit Alive

During the intense Space Race of the Cold War, the Soviet Union pursued rapid advances in human spaceflight capabilities. On August 19, 1960, the USSR launched Korabl-Sputnik 2, known in the West as Sputnik 5, carrying two dogs named Belka and Strelka, along with mice, rats, and other biological specimens. The spacecraft completed 18 orbits before successfully reentering Earth's atmosphere and landing safely the following day. This marked the first time living creatures returned from orbital flight unharmed, providing critical data on the effects of space travel on biology. The mission directly informed preparations for the first human orbital flight less than a year later.

Event DetailDaily Earth View
1961

Science20th CenturyNorth America

Ham the Chimpanzee Completes Suborbital Space Flight

In the early years of the U.S. space program, NASA used chimpanzees to test the Mercury spacecraft systems before risking human lives. Ham, a three-year-old chimpanzee, underwent extensive training for the Mercury-Redstone 2 mission. On January 31, 1961, Ham launched aboard a Redstone rocket from Cape Canaveral and experienced 16 minutes of suborbital flight, reaching an altitude of 157 miles. He performed simple tasks during weightlessness and survived the stresses of launch, reentry, and splashdown in the Atlantic Ocean. Ham's successful flight proved that primates could endure space travel conditions. The mission cleared the way for Alan Shepard's historic human suborbital flight three months later.

Event DetailDaily Earth View
1961

Science20th CenturyNorth America

Kennedy Commits U.S. to Moon Landing Goal

The Soviet Union's early lead in the Space Race, highlighted by Sputnik and Yuri Gagarin's flight, alarmed U.S. leaders during the Cold War. On May 25, 1961, President John F. Kennedy addressed a joint session of Congress, urging a national commitment to land a man on the Moon and return him safely by the end of the decade. He requested increased funding for NASA and framed the effort as essential for American prestige and technological supremacy. The speech accelerated the Apollo program, leading to massive investments in rocketry, computing, and materials science. Kennedy's vision was realized with Apollo 11 in 1969.

Event DetailDaily Earth View
1961

Science20th CenturyGlobal

Antarctic Treaty Enters into Force for Peaceful Science

During the International Geophysical Year of 1957–1958, twelve nations conducted extensive scientific research in Antarctica, demonstrating successful international cooperation despite territorial claims. The Antarctic Treaty was signed in Washington, D.C., on December 1, 1959, by Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, the Soviet Union, the United Kingdom, and the United States. It entered into force on June 23, 1961, after ratification by all signatories. The agreement reserved the continent exclusively for peaceful purposes, prohibited military activities and nuclear explosions, and guaranteed freedom of scientific investigation while freezing existing territorial claims.

Event DetailGuided Physics
1962

Science20th CenturyNorth America

John Glenn Orbits Earth in Friendship 7

In the midst of the Cold War space race, the United States aimed to match Soviet achievements in human spaceflight. On February 20, 1962, astronaut John Glenn launched aboard the Mercury-Atlas 6 spacecraft named Friendship 7 from Cape Canaveral. The mission completed three orbits of Earth over nearly five hours, with Glenn manually controlling aspects of the flight after a faulty sensor caused concern. He splashed down safely in the Atlantic Ocean, becoming the first American to achieve orbital flight. The successful mission provided critical data on human performance in space and boosted national confidence in the Mercury program.

Event DetailDaily Earth View
1962

Science20th CenturyNorth America

NASA Launches Mariner 2 to Venus

In the early Space Race, NASA sought to send probes beyond Earth orbit amid competition with the Soviet Union. Mariner 2, part of the Mariner program, was designed as a flyby mission to study Venus after an earlier attempt failed. The spacecraft lifted off from Cape Canaveral on August 27, 1962, aboard an Atlas-Agena rocket. It traveled over 100 million miles, encountering technical issues en route that were overcome through ground commands. On December 14, Mariner 2 flew within 21,600 miles of Venus, becoming the first spacecraft to successfully return data from another planet. Measurements revealed Venus's extreme surface temperatures and confirmed the existence of the solar wind.

Event DetailDaily Earth View
1962

Science20th CenturyGlobal

Mariner 2 Completes First Successful Planetary Flyby

NASA launched Mariner 2 on August 27, 1962, as part of its early interplanetary program following the failure of Mariner 1. The spacecraft traveled 110 days through space, measuring solar wind, cosmic rays, and interplanetary dust en route. On December 14, 1962, it passed within 34,773 kilometers of Venus, becoming the first probe to successfully encounter another planet. Instruments revealed Venus's extremely hot surface temperatures around 500°C, cool cloud layers, and absence of a detectable magnetic field. Data transmission continued briefly after the encounter, confirming the viability of deep-space probes.

Event DetailDaily Earth View
1963

Science20th CenturyRussia & Central Asia

Valentina Tereshkova Becomes First Woman in Space

During the early Space Race, the Soviet Union sought to demonstrate technological superiority and gender inclusivity in its space program following Yuri Gagarin's historic flight. On June 16, 1963, cosmonaut Valentina Tereshkova launched aboard Vostok 6 from the Baikonur Cosmodrome. She completed 48 orbits over nearly three days, becoming the first woman to travel into space. Tereshkova, a textile factory worker and amateur parachutist selected from a group of female candidates, manually controlled aspects of the mission and conducted experiments on the effects of spaceflight on the female body. Her safe return on June 19 provided valuable data for future long-duration flights. The mission highlighted Soviet achievements in human spaceflight at a critical juncture in Cold War competition.

Event Detail
1964

Science20th CenturyNorth America

U.S. Surgeon General Links Smoking to Cancer

By the early 1960s, mounting scientific evidence suggested connections between tobacco use and disease, prompting President John F. Kennedy to commission a comprehensive review. Surgeon General Luther Terry assembled an advisory committee that analyzed over 7,000 studies. On January 11, 1964, Terry released the landmark report 'Smoking and Health' at a press conference, concluding that cigarette smoking caused lung cancer in men, was the primary cause of chronic bronchitis, and contributed to heart disease and emphysema. The document estimated smokers faced nine to ten times the risk of lung cancer compared to nonsmokers. Released on a Saturday to minimize market disruption, the report became front-page news and catalyzed federal anti-tobacco policies.

Event DetailAmerica 250 Atlas
1964

Science20th CenturyGlobal

NASA Launches Mariner 4 to Mars

In the early Space Race, the United States sought to demonstrate technological superiority by sending probes beyond the Moon. After the failure of Mariner 3 days earlier, NASA prepared Mariner 4 as a backup. On November 28, 1964, an Atlas-Agena rocket lifted off from Cape Canaveral, Florida, carrying the 260-kilogram spacecraft. Mariner 4 was designed to fly past Mars, photograph its surface, and measure the interplanetary environment. The successful launch opened an eight-month journey that would yield the first close-up images of another planet.

Event DetailDaily Earth View
1965

Science20th CenturyRussia & Central Asia

Soviet Cosmonaut Performs First Spacewalk

During the height of the Space Race, the Soviet Union aimed to achieve another milestone ahead of the United States following earlier orbital flights. On March 18, 1965, cosmonaut Aleksei Leonov exited the Voskhod 2 spacecraft through an inflatable airlock while orbiting Earth. He spent approximately 12 minutes outside, connected by a tether, becoming the first human to perform a spacewalk despite challenges with his suit inflating in the vacuum. The mission, commanded by Pavel Belyayev, returned safely after 26 hours in orbit. This achievement advanced understanding of human capabilities in space and extravehicular activity techniques.

Event DetailDaily Earth View
1967

Science20th CenturySub-Saharan Africa

First Successful Human Heart Transplant Performed

By the mid-1960s, surgical techniques and immunosuppression had advanced enough for organ transplantation experiments, though rejection remained a major hurdle. In South Africa, surgeon Christiaan Barnard had trained in the United States and prepared a team at Groote Schuur Hospital in Cape Town. On December 3, 1967, 53-year-old grocer Louis Washkansky, suffering from terminal heart disease, received a heart from 25-year-old Denise Darvall, who had died in a car accident. The operation lasted several hours and initially succeeded. Washkansky survived 18 days before succumbing to pneumonia linked to anti-rejection drugs. The procedure captured global attention as a medical milestone.

Event Detail
1969

Science20th CenturyGlobal

Apollo 11 Crew Returns Safely to Earth

After Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon on July 20, the Apollo 11 crew—joined by Michael Collins in lunar orbit—departed the lunar surface and began the return journey. On July 24, the command module Columbia reentered Earth's atmosphere and deployed parachutes before splashing down in the Pacific Ocean roughly 1,400 miles southwest of Honolulu. Recovery teams from the USS Hornet quickly reached the spacecraft, where the astronauts donned biological isolation garments before transfer to the carrier. President Nixon greeted them aboard ship, and the crew underwent three weeks of quarantine. The successful mission fulfilled President Kennedy's 1961 goal and concluded eight days of travel covering nearly one million miles.

Event DetailDaily Earth View
1971

Science20th CenturyGlobal

NASA Launches Mariner 9 to Orbit Mars

NASA's Mariner program advanced planetary exploration after earlier flyby successes. Mariner 9, an orbiter designed to map Mars' surface and study its atmosphere, launched on May 30, 1971, from Cape Canaveral aboard an Atlas-Centaur rocket. It arrived at Mars in November 1971, becoming the first spacecraft to orbit another planet after a dust storm delayed imaging. Over 7,000 images revealed volcanoes, canyons, and dry riverbeds, fundamentally changing understanding of Martian geology. The mission operated until October 1972, far exceeding expectations.

Event DetailDaily Earth View
1977

Science20th CenturyGlobal

NASA Launches Voyager 1 Spacecraft

By the mid-1970s, NASA had planned ambitious missions to explore the outer planets using a rare planetary alignment. Voyager 1, the second of two identical probes, lifted off from Cape Canaveral on September 5, 1977, aboard a Titan IIIE-Centaur rocket, sixteen days after its twin Voyager 2. The spacecraft carried instruments to study Jupiter, Saturn, and their moons, along with a golden record containing sounds and images of Earth for any extraterrestrial finders. Voyager 1 quickly surpassed expectations, returning stunning images and data during its Jupiter encounter in 1979 and Saturn flyby in 1980 before continuing outward.

Event DetailDaily Earth View
1978

ScienceBorn On20th CenturyEurope

World's First Test-Tube Baby Louise Brown Born

Infertility treatments advanced in Britain through the work of obstetrician Patrick Steptoe, physiologist Robert Edwards, and embryologist Jean Purdy at Oldham General Hospital. After years of laboratory research on in vitro fertilization, an egg from Lesley Brown was fertilized with sperm from her husband John in a Petri dish. The resulting embryo was implanted, leading to a successful pregnancy. On July 25, Louise Joy Brown was delivered by cesarean section just before midnight, becoming the first human born via IVF. The birth drew global media attention and ethical debate but proved the technique viable.

Event Detail
1980

Science20th CenturyGlobal

WHO Officially Declares Smallpox Eradicated

Smallpox had plagued humanity for thousands of years, killing hundreds of millions and leaving survivors scarred or blind. A global vaccination campaign intensified in 1967 under the World Health Organization, using ring vaccination strategies to contain outbreaks even in remote areas. The last natural case occurred in Somalia in 1977, after which extensive surveillance confirmed no further transmission. On May 8, 1980, the 33rd World Health Assembly formally declared that the world and all its peoples had won freedom from smallpox, the first human disease eradicated through deliberate effort. The achievement required unprecedented international cooperation across Cold War divides.

Event Detail
1990

Science20th CenturyNorth America

Most Complete T. rex Skeleton Found

Paleontologist Susan Hendrickson was prospecting in the badlands near Faith, South Dakota, when she spotted three large bones protruding from a cliff face on August 12, 1990. The find belonged to a Tyrannosaurus rex that had died approximately 67 million years earlier. Excavation over subsequent months revealed a remarkably complete and well-preserved skeleton, later named "Sue" after its discoverer, with over 90 percent of the bones recovered. The specimen provided unprecedented insights into the anatomy and biology of the iconic dinosaur.

Event Detail
1992

Science20th CenturyNorth America

Endeavour Launches STS-47 with Mae Jemison

NASA's Space Shuttle Endeavour lifted off on its second mission, STS-47, marking the 50th shuttle flight overall. The September 12, 1992, launch carried a diverse crew that included Mae Carol Jemison, the first African-American woman in space, Japanese astronaut Mamoru Mohri, and the first married couple to fly together, Mark Lee and Jan Davis. The Spacelab-J mission focused on microgravity research in materials science, life sciences, and technology development through international collaboration between NASA and Japan's National Space Development Agency. The flight completed 126 orbits over eight days, advancing scientific knowledge and demonstrating inclusive crew selection. Jemison's presence highlighted expanding opportunities in STEM fields.

Event DetailDaily Earth View
1995

Science20th CenturyNorth America

Top Quark Discovery Announced at Fermilab

Physicists had predicted six quarks in the Standard Model since the 1970s, with the bottom quark found in 1977, leaving the top as the final missing piece. Two rival teams at Fermilab's Tevatron collider, CDF and DZero, searched for evidence in high-energy proton-antiproton collisions over several years. After accumulating sufficient data and cross-checking results, the collaborations jointly announced the discovery on March 2, 1995. The particle's mass was measured near 176 GeV/c², confirming theoretical expectations. The announcement filled a key gap in particle physics and validated the Standard Model's structure for matter particles.

Event DetailGuided Physics
1995

Science20th CenturyGlobal

Amateur Astronomers Discover Comet Hale-Bopp

Comet discoveries had slowed in the mid-1990s when two independent observers scanned the night sky on July 23, 1995. Alan Hale in Cloudcroft, New Mexico, and Thomas Bopp near Stanfield, Arizona, each spotted a fuzzy object near the globular cluster M70 in Sagittarius while using modest backyard telescopes. The comet, designated C/1995 O1, was unusually bright at discovery—magnitude 10.5—and located far from the Sun at 7.15 AU, suggesting it would become exceptionally visible. The International Astronomical Union quickly confirmed the joint find. Hale-Bopp reached peak brightness in 1997, visible to the naked eye for months and becoming one of the most observed comets of the 20th century.

Event DetailDaily Earth View
2001

Science21st CenturyGlobal

First Draft of Human Genome Sequence Published

The Human Genome Project, an international effort involving thousands of scientists across multiple countries, aimed to map the roughly 3 billion base pairs of human DNA. On February 15, 2001, the journal Nature published the initial sequencing and analysis of the working draft, covering over 90 percent of the genome with gaps still remaining. A companion paper appeared in Science the following day. The achievement built on advances in sequencing technology and collaborative data sharing. It provided a foundational reference for understanding genetic variation and disease.

Event DetailPeopling Earth
2008

Science21st CenturyEurope

Large Hadron Collider Begins Operations at CERN

Particle physicists had long sought a machine capable of recreating conditions close to the Big Bang to test fundamental theories of matter and forces. The European Organization for Nuclear Research (CERN) constructed the Large Hadron Collider, a 27-kilometer underground ring straddling the French-Swiss border, over more than a decade. On September 10, 2008, operators successfully circulated the first proton beams through the accelerator, marking the start of what was then described as the world's largest scientific experiment. The event drew global attention as beams reached near-light speeds in opposite directions. Subsequent runs led to major discoveries, including the Higgs boson.

Event DetailGuided Physics
2011

Science21st CenturyNorth America

NASA Launches Mars Curiosity Rover

NASA's Mars Science Laboratory mission aimed to investigate Mars' habitability with a sophisticated mobile laboratory. The car-sized Curiosity rover was mounted atop an Atlas V rocket at Cape Canaveral. On November 26, 2011, the spacecraft lifted off successfully, beginning a 350-million-mile journey to the Red Planet. The launch incorporated advanced entry, descent, and landing technologies for the rover's eventual touchdown in Gale Crater. Mission controllers confirmed the spacecraft was on course shortly after separation from the booster.

Event DetailDaily Earth View