According to Mike Dash, a Welsh historian, few scientists doubt there are thousands of unknown animals, particularly invertebrates, awaiting discovery ; however, cryptozoologists are largely uninterested in researching and cataloging newly-discovered species of ants or beetles, instead focusing their efforts towards " more elusive " creatures that have often defied decades of work aimed at confirming their existence.

Evidence suggests a third release in 1938, consisting of toads being used for human pregnancy tests — many species of toad were found to be effective for this task, and were employed for about 20 years after the discovery was announced in 1948.

The tests using toads were faster than those employing mammals ; the toads were easier to raise, and, although the initial 1948 discovery employed Bufo arenarum for the tests, it soon became clear that a variety of anuran species were suitable, including the cane toad.

The extinction of the Dodo within only about a century of its discovery called attention to the previously unrecognised problem of human involvement in the disappearance of entire species.

The first major challenge to conventional eugenics based upon genetic inheritance was made in 1915 by Thomas Hunt Morgan, who demonstrated the event of genetic mutation occurring outside of inheritance involving the discovery of the hatching of a fruit fly with white eyes from a family and ancestry of the red-eyed Drosophila melanogaster species of fruit fly.

Despite the 1891 discovery by Eugène Dubois of what is now called Homo erectus at Trinil, Java, it was only in the 1920s when such fossils were discovered in Africa, that intermediate species began to accumulate.

Prior to this discovery, biologists had been largely unable to establish a family tree of cats from the fossil record because the fossils of different cat species all look very much alike, differing primarily in size.

The discovery and description of this species is credited to both Mary and Louis Leakey, who found fossils in Tanzania, East Africa, between 1962 and 1964.

These postulates were first used in the discovery that Mycobacteria species cause tuberculosis.

Often genetic and biochemical tests are necessary to confirm the discovery of a new species.

Numerous species have been assigned to Pterodactylus in the years since its discovery.

In 2007, paleontologists reported the discovery of quill knobs on a well-preserved Velociraptor mongoliensis forearm from Mongolia, confirming the presence of feathers in this species.

** Louis Leakey announces the discovery of pre-human fossils in Kenya ; he names the species Kenyapithecus africanus.

Research in biosalinity includes studies of the biochemical and physiological mechanisms of salt tolerance in plants, breeding and selection for salt tolerance ( halotolerance ), discovery of periods in a crop plant's life cycle when it may be less sensitive to salt, use of saline irrigation water to increase desirable traits ( such as sugar concentration in a fruit ) or to control the ripening process, study of the interaction between salinity and soil properties, and development of naturally salt-tolerant plant species ( halophytes ) into useful agricultural crops.

* Extensive information on rhododendron species: the history of their discovery, botanical details, toxicity, classification, cultural conditions, care for common problems, and suggestions for companion plants by Steve Henning.

Discovery of the hydrothermal vents in the eastern Pacific Ocean was quickly followed by the discovery and description of new vestimentiferan tubeworm species.

Much more publicity was given to the " discovery " by Augustus T. Dowd of the Calaveras Grove in 1852, and this is commonly cited as the species ' discovery.

Since 2002, a tremendous amount of activity by Filipino scientists has resulted in the discovery and naming several new species of Rafflesia.

Numerous species are very poorly known, the Fiji Petrel has only been seen a handful of times since its discovery and the breeding colonies of the New Zealand Storm Petrel, Hornby's Storm Petrel and Heinroth's Shearwater have never been located.

Parallel analysis of the genome and the proteome facilitates discovery of post-translational modifications and proteolytic events, especially when comparing multiple species ( comparative proteogenomics ).

It is generally considered that most, if not all, species of moa died out due to over-hunting by the Māori, by 1400AD, and habitat decline before European discovery and settlement.

Some, like the Red Owl, have barely been seen or studied since their discovery, in contrast to the Common Barn Owl, which is one of the best known owl species in the world.

The sequence of events leading to his important discovery still remains ambiguous but it seems that one of the advanced students at the university related that the first direct event that led to the publication of Oersted's discovery occurred during a private lecture made before a group of other advanced students in the spring of 1820.

Kearton and Ulyate had started the day together while Jones followed the dogs, and Means and Loveless had taken another route, and now, with the discovery of the fresh trail still unknown to him, Ulyate reined in, in the shadow of the Reef and pointed.

His discovery of penicillin had changed the world of modern medicine by introducing the age of useful antibiotics ; penicillin has saved, and is still saving, millions of people around the world.

The nature of the Secret Gospel of Mark as well as Morton Smith's role in its discovery are still being debated.

However host discovery or ping scanning or ping sweep is still a part of network scanning tools like nmap, as it may give basic evidence about the existence of a remote machine.

The discovery of Pluto in 1930 confounded the issue still further.

Even though natural product drug discovery has not probably been the most fashionable trend in pharmaceutical industry in recent times, a large proportion of new chemical entities still are nature-derived compounds, and thus, it has been suggested that effectiveness of combinatorial chemistry could be improved by enhancing the chemical diversity of screening libraries.

" Other members of the crew decide to stay on the planet to learn from the contented citizens, and are rewarded by the discovery that " he " is still on the planet.

The 4th century was a time of largescale Christianisation, and the discovery provides us with evidence that even during the decline of traditional Roman religion, the god Faunus was still worshipped.

Though this method was a significant improvement over the method of cauterization, it was still dangerous until infection risk was brought under control-at the time of its discovery, the concept of infection was not fully understood.

Amateur astronomers have contributed to many important astronomical discoveries, and astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and observation of transient phenomena.

This leads to the discovery that Antigone is still alive.

The first discovery of gold, at Rancho San Francisco in the mountains north of present-day Los Angeles, had been in 1842, six years before Marshall's discovery, while California was still part of Mexico.

While they were still on the high seas, in May 1840 Hobson proclaimed British sovereignty over the South Island by virtue of Captain Cook's discovery.

Nonetheless, this is still longer than the predicted values used in the discovery report.

Burton, who had been recovering from illness at the time and resting further south on the shores of Lake Tanganyika, was outraged that Speke claimed to have proved his discovery to have been the true source of the Nile, which Burton regarded as still unsettled.

The discovery of fatherhood led to the supremacy of the father lineal over the matrilineal descentwhich is still characteristic of most models of family we observe todayand, most of all, to the sacral character assigned to the sexual act which was rapidly regulated by severe norms.

The discovery is still disputed between Jim White and Abijah Long.

The discovery of Aristotle's Constitution of the Athenians in 1890 reversed this trend for the broad assessment of Theramenes ' character, and Diodorus ' account of the Arginusae trial has been preferred by scholars since Antony Andrewes undermined Xenophon's account in the 1970s ; Diodorus ' more melodramatic passages, such as his elaborate presentation of Theramenes ' last moments, are still discounted, but he is now preferred on a number of issues, and on the Arginusae trial in particular.

The Canadian city of Greater Sudbury, Ontario ( formerly known as Sudbury and still referred to as Sudbury in everyday usage ) was named after Sudbury, becoming a settlement in 1883 following the discovery of rich nickel and copper ores there during the construction of the Canadian Pacific Railway.

* Lena Blackburne ( 1886 – 1968 ), major league baseball player and manager best known for his discovery of a mud in a tributary of the Delaware River near Palmyra which is still used to rub down baseballs allowing pitchers to gain better control over the ball.

It is exercised with somewhat greater frequency, although still sparingly, in the context of discovery disputes involving privileged materials, since a district court order erroneously forcing the disclosure of privileged material may never be remediable through a later appeal.