This year brought the discovery of new human ancestor in South Africa, 211 new species in the Eastern Himalayan, and the first new antibiotic in almost 30 years. As 2015 comes to a close, here is a look back at some of the top scientific breakthroughs, discoveries, and announcements.
A new human ancestor: Homo nalendi
In September, scientists announced the discovery of a previously unknown human ancestor, homo nalendi, found in a cave in South Africa. The unearthed fossils represented at least 15 individuals characterized by body mass and stature similar to small-bodied humans. The homo nalendi fossils are the largest collection of a single species found in Africa, adding yet another branch to the human family tree.
CRISPR gene-editing advancements
This year, scientists hit a number of breakthroughs using the gene-editing technology CRISPR. Researchers in China reported modifying the DNA of a nonviable human embryo, a controversial move. Researchers at Harvard University inserted genes from a long-extinct woolly mammoth into the living cells — in a petri dish — of a modern elephant. Elsewhere, scientists reported using CRISPR to potentially modify pig organs for human transplant and modify mosquitoes to eradicate malaria.
Hundreds of new species discovered
In 2015, the World Wildlife Foundation published a 4-year report begun in 2009 announcing the discovery of 211 new species in the Eastern Himalayan region, including 133 plants, 39 invertebrates, 26 fish, 10 amphibians, one reptile, one bird, and one mammal.
Free-flowing water on Mars
In September, NASA scientists presented what they said was the strongest evidence yet of the presence of water on Mars: flowing salty streaks of water that vary with the seasons. Scientists were also able to detect the presence of waterlogged molecules, called perchlorates. This discovery makes the presence of living organisms on the planet more likely.
Cancer-detecting blood test
Researchers in Sweden developed a blood test that can detect cancer at an early stage from a single drop of blood. The test can accurately detect the disease 96 percent of the time and classify the type of cancer correctly 71 percent of the time. Differences detected with the test can also be used to help doctors determine the best course of treatment.
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SOURCE: UPI, Michelle Hill