Table of Contents January/February 2016

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Discover's 100 top stories of 2015 is jam-packed with the best in science from the past year. From space exploration to medicine, technology, paleontology and environment, we've got every field covered. Highlights include our first look at Pluto, Kennewick Man's genetic roots, LHC reactivated and the ethics of editing human embryos.
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TOP TEN

#1pluto_cover
Pluto's been a blank space in our portrait of the solar system, so obscured that astronomers did not even know its exact size or color. But no longer.
#2naledi_collection
An underground cave reveals a collection of fossils that could bring a new human species into the fold.
#3palmyra
Militants wage war on the cultural heritage of an entire region.
#4windmills
In the hottest year yet, nations vow to kick the carbon habit.
#5ceres
The dwarf planet gets its first close-up and reveals its own surprises.
#6harmand
A fossil find rewinds the timeline for the creation of stone tools.
#7ebola_aftermath
Experts weigh in on the ongoing battle against Ebola’s legacy.
#8inner-demons
Results from the field’s biggest replication study yet make it clear psychology has room for improvement.
#9rosetta
The spacecraft continues to sate our curiosity.
#10embryo
Researchers alter human DNA and spark a heated ethical debate.

THE REST OF THE BEST

#11fly
The door to designer species swung wide open in March.
#12brontosaurus
The long-necked dinosaur, whose stardom got overshadowed by T. rex, seeks redemption.
#13vaccine
Instead of aiming for the head, new research suggests it might be better to stick it to the bug.
#14sun
Compared to the surface, the sun's atmosphere is blazing hot. So what's heating it?
#15rhino
It's the end of many species as we know it. And we're the responsible ones.
#16LHC-online
The upgraded particle collider gets supercharged.
#17touch-laser
Short laser bursts create a finger-friendly 3-D hologram in midair.
#18tesla-battery
Company hopes its lithium-ion battery can reduce our dependence on fossil fuels.
#19brain
New imaging technique shows the differences between post-traumatic stress disorder and traumatic brain injury.
#20chilesaurus
Even though it was a cousin of meat-eaters, this 10-foot lizard favored plants.
#22mental-health
DNA sequencing shifts focus from neurons to metabolism.
#23wet-mars
NASA finds evidence of bursts of liquid water on the Red Planet.
#24first-farmers
Specimens at ancient Israeli site suggest agriculture began earlier than we thought.
#25antarctica
Continent's ice shelves are succumbing to deep, warm ocean currents underneath.
#26mercury
NASA probe uncovers a lively planet before meeting its demise at 8,800 mph.
#27immune-connection
Lymphatic tubes are discovered in the place you'd least expect: the brain.
#28jawbone
A 2.8-million-year-old jaw is the oldest fossil from our genus.
#29rat-limb
A dead rat's forearm is regrown in a lab and successfully transplanted onto a living rat.
#30lake-oroville
California and other Western states feel the heat, the burn and the dryness.
#31fire-distance
With more than 9 million acres burned, the U.S. endured one of the worst fire seasons since 1960.
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