Tobacco manufacturers legally obliged to print a warning on the labels that smoking is a health hazard.

Five pairs of adult wall lizards are moved between two islands in Croatia. Over the next few decades, the lizards on the new island will evolve larger heads, stronger bites, and a greater tolerance for an herbivorous diet than the original lizard population.

A. G. Sharov describes a pterosaur with fossil "hair" impressions as Sordes pilosus (hairy devil).

Grad student Douglas Lawson discovers the humerus of a giant pterosaur in Texas. Over the next four years, he will continue collecting and finally publish a description of Quetzalcoatlus northropi, the largest flying animal ever found, with an estimated wingspan of 39 feet.

Polish and Mongolian paleontologists discover the entwined skeletons of a Protoceratops and a juvenile Velociraptor in the Gobi Desert, most likely locked in mortal combat.

Stephen Jay Gould and Niles Eldredge publish their theory of punctuated equilibrium, stating that evolution often occurs in short bursts, followed by long periods of stability.

Christian B. Anfinsen, Stanford Moore, and William H. Stein share a Nobel Prize in Chemistry, with Anfinsen cited for his work on ribonuclease, especially concerning the connection between the amino acid sequence and the biologically active conformation, and Moore and Stein cited for their contribution to the understanding of the connection between chemical structure and catalytic activity of the active centre of the ribonuclease molecule.

Bob Bakker publishes "Anatomical and Ecological Evidence of Endothermy in Dinosaurs" in Nature, arguing that dinosaurs were warm-blooded animals.

Harry Whittington shows a preliminary reconstruction of the Burgess Shale species Opabinia at a Palaeontological Association meeting, and the crowd roars with laughter.

Half in jest, Francis Crick and Leslie Orgel suggest that ancient aliens may have seeded the early Earth with DNA, and all life on this planet arose from that.

Peter and Rosemary Grant begin a long-term study of finches on the Galápagos Islands. In succeeding years, as they watch finches adapt to alternating wet and dry conditions, the Grants will uncover evidence that evolution proceeds more rapidly than what Darwin estimated.

Taking a line from Through the Looking Glass, Leigh Van Valen establishes the "Red Queen" hypothesis of coevolution between predator and prey: "it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast as that!"

Heinz Tobien collects a primate tooth fragment from limestone rocks in southern Germany. Studies published decades later, in 2001 and 2011, will suggest that the fossil is 17 million years old, and that a hominoid migration into Eurasia occurred 3 million years earlier than previously thought.

Donald Johanson and his team discover a female fossil hominid (to be later named Australopithecus afarensis) and call her Lucy. Lucy's discovery establishes that hominids walked upright before developing large brains, overturning some long-held beliefs about hominid evolution. Her status as a direct ancestor of modern humans, however, will remain controversial.

Heavy equipment operator Porky Hansen accidentally uncovers a mammoth tusk while leveling ground for a building. The site will reveal many more mammoths, becoming a tourist attraction for Hot Springs, South Dakota.

John Ostrom publishes a paper titled "Archaeopteryx and the Origin of Flight" reviving Thomas Henry Huxley's arguments from the 1860s.

Mary-Claire King and Allan Wilson publish their finding that human and chimpanzee DNA sequences differ by roughly 1 percent, meaning humans have more in common with chimps than chimps do with gorillas. King and Wilson suggest that humans and chimps differ largely in the DNA that switches on and off genes.

David Baltimore, Renato Dulbecco, and Howard Temin share Nobel Prize in Medicine for their discoveries concerning the interaction between tumour viruses and the genetic material of the cell.

Armed with an old geological map, selt-taught fossil hunter Joan Wiffin finds New Zealand's first recognized dinosaur fossil, a theropod tail vertebra, in the Maungahouanga Valley.

Overturning the classifications introduced by R. H. Whittaker seven years earlier, Carl Woese proposes to divide all living things into three categories: Bacteria, Archaea and Eukarya.

Paleontologists looking for cave bear remains explore Sima de los Huesos ("Pit of the Bones") at Atapuerca, Spain. For many years afterwards, it will remain the densest accumulation of fossil human bones ever discovered, including the remains of more than 30 Homo heidelbergensis individuals.

Submersible vehicle Alvin reveals deep sea vents on the ocean floor that give rise to an ecosystem owing nothing to photosynthesis. This finding prompts speculation that life on Earth first arose in deep-sea, not shallow-water, ecosystems.

Fred Sanger and collaborators publish the first complete DNA sequence of an organism, a bacteriophage, or virus infecting bacteria.

F. Metzger-Krahé describes a ninth-century Viking settlement in southern Jutland — perhaps the first city-like settlement in Northern Europe — holding 185 fossils, most of them sea urchins.

Werner Arber, Dan Nathans, and Hamilton Smith share a Nobel Prize in Medicine for the discovery of restriction enzymes and their application to problems of molecular genetics.

J. W. Kitching discovers a clutch of prosauropod eggs in South Africa, the oldest dinosaur embryos yet found. They will show that sauropods walked on all fours as small animals, but the significance of this find will be overlooked for nearly three decades.

Mary Leakey announces the discovery of fossil footprints at Laetoli demonstrating that hominids walked upright 3.6 million years ago.

Fresh out of law school and short on cash, Robert Heggestad buys an antique cabinet on an installment plan from a Virginia antique shop. The cabinet turns out to contain some 1,700 plant and invertebrate specimens from the personal collection of Alfred Russel Wallace.

Crystal Bennett finds a human-altered sea urchin fossil in Islamic (Fatimid) deposits dating from the 10th to 12th centuries in the Amman Citadel.

The Geological Society of America awards 96-year-old Harlen Bretz the Penrose Medal for identifying the cause of the Channeled Scablands in the northwestern United States: a massive flood from Glacial Lake Missoula after it broke through its ice dam. The recognition is somewhat late as Bretz first hypothesized a megaflood in the 1920s.