The year 2017 yielded big discoveries and events from a rare solar eclipse, to the fiery demise of a long-serving NASA spacecraft in Saturn's atmosphere, to new gene editing techniques.
It is impossible to include every significant research event this year, but here is a list of some of the most-watched events and most-read stories.
In October scientists from several institutions around the world said they discovered two neutron stars merging for the first time. Researchers detected the event 130 million light years away through the gravitational waves the stars gave off before merging. The event yielded several scientific discoveries — among them that such events are how neutron-rich elements, such as gold, are created. Fully 3,674 researchers and 953 institutions contributed to one paper summarizing the findings.
It was a big year for the commercial space race. 2017 will mark the first time commercial launches across the globe outpaced government-sponsored launches. Through September, there were 41 commercial launches and 28 under government contract.
SpaceX became the first to both launch and land two different rockets within a 48-hour window. It also became the first company to launch a resupply mission to the International Space Station on a reused rocket. Blue Origin launched and landed a New Shepard booster for the first time in 14 months, while also successfully deploying its Crew Capsule 2.0 for the first time.
The total solar eclipse was a rare event that offered scientists a chance to try out some new experiments on the ground. In particular, eclipses allow scientists to glimpse the areas at the every edges of the sun, such as the corona. Normally, this area is obscured by the much brighter center of the sun. One team tested some new techniques meant to protect satellites and the power grid from solar flares and coronal mass ejections. The eclipse also gave a chance to examine the impact of shocks to the solar power grid, and the effect of solar eclipses on animal behavior.
Researchers such as Massachusetts Institute of Technology professor Regina Barzilay are trying to use artificial intelligence to improve cancer diagnosis and treatment. It is one of several examples of the increasing utility of computing in the medical field.
"The potential is perhaps the biggest in any type of technology we've ever had in the field of medicine," said Dr. Eric Topol, director of the Scripps Translational Science Institute. "Computing capability can transcend what a human being could ever do in their lifetime."
In November, researchers said they discovered a new species of orangutan in the forests of Sumatra, now named Pongo tapanuliensis. It is the first time a new species of ape has been discovered in almost 90 years. Of course, they are already considered the most endangered ape species in the world, with only about 800 left in the wild.
After a 13-year mission, the spacecraft Cassini descended into Saturn's atmosphere and immediately disintegrated, all according to plan. The project was a collaboration between NASA, the European Space Agency and the Italian Space Agency. The craft explored not only Saturn itself, but the moons of Titan and Enceladus — a moon that may have the necessary conditions for sustaining life. The mission also gave scientists an unprecedented amount of information about Saturn, including what makes up its rings.
In June 2017, fossils were uncovered in Morocco that dated over 300,000 years old. The discovery provides evidence that the first humans may have lived 100,000 years earlier than previously thought and may rewrite the story of human origins.
Separately, an extremely rare 13 million-year-old skull was found in Kenya, possibly the most intact primate fossil skull ever found. It sheds light on a little known period of primate evolution.
There were several developments in CRISPR gene editing in 2017. Among some of the notable achievements, two different papers published in October demonstrated new techniques that in one case make CRISPR editing more efficient for some applications, and in the other case make them less risky.
One team developed a method for editing small "point mutations," which account for a range of diseases, from genetic blindness to sickle-cell anemia to metabolic disorders to cystic fibrosis.
Another team developed a method for editing RNA instead of DNA, which would allow scientists to use CRISPR to treat diseases without permanently changing a patient's genome.
Elsewhere, a group of researchers used the highly efficient process to create a skin graft capable of reducing the symptoms of diabetes and obesity in mice. Another group of scientists published research that brought the world one step closer to growing transplantable human organs in the bodies of pigs.
Scientists published a mound of some 40 papers discussing the first bits of information sent back from the Juno mission to Jupiter in March, continuing the exploration of the largest planet in the solar system. The findings shed light on Jupiter's massive magnetic field, unexpected structures beneath its cloud tops, and massive storms brewing around the planet.
"There is so much going on here that we didn't expect that we have had to take a step back and begin to rethink of this as a whole new Jupiter," said Juno principal investigator Scott Bolton, at the time.
The craft also flew over the famous "eye" of the planet in July.
The Juno space craft is set to finish its mission in February 2018, when it will descend into Jupiter's atmosphere and be destroyed.