Aggression ranged from chasing to biting and hitting.
Its last task was to reposition itself so that as the comet soars toward the sun, Philae’s batteries may recharge enough for a follow-on mission.
China, Africa's biggest trade partner, had come under fire for the level of its response to the Ebola crisis.
The 2015 Breakthrough Prizes honors winners in the fields of physics, mathematics and life sciences.
The action 317 million miles away on a comet was more interesting than the "Paper" magazine photos of Kim Kardashian.
A study has mapped the magnetic fields of the chondrule grains which came from a meteorite named Semarkona.
After landing on a comet, the Philae's battery is dying without sunlight, but the probe sent one last package of crucial data to Earth.
The number of high schoolers smoking e-cigarettes has tripled since 2011, reigniting arguments about teen-targeted advertising.
A real-life “unicorn” recently discovered in Slovenia was actually a roe deer with a rare deformity.
Summit and Sierra will be able to process data nearly ten times faster than today's most efficient systems.
Two sets of human footprints were recently discovered near the banks of the Baltic Sea in Denmark.
At current overharvesting rates, all the world's fisheries will have collapsed by 2048, experts have warned.
The U.S. will commit $3 billion to climate change efforts in poor countries, President Obama will announce Friday.
Infanticide among mammals is a strategic way for males to ensure that their own offspring survive, new research suggests.
Philae is currently balanced on two of its three legs and has raised concerns that starting the drill may tip the probe over.
A team of scientists was able to predict influenza outbreaks in the U.S., Poland, Japan and Thailand by tracking page views on Wikipedia.
The surgeon, who is being evaluated for travel, is a citizen of Sierra Leone and a permanent U.S. resident.
The trial of three Brazilians who police believe murdered and ate up to 10 women started Thursday.
Fast food restaurants were more likely to direct their ads toward children in black neighborhoods, a new study found.
There is a growing body of evidence that supports the idea that bacteria in our guts can affect human behavior.
A measure backing Keystone XL may pass Congress, but Obama is likely to veto any challenge to his authority over it.
The surface of Uranus, the third-largest planet in the solar system, has normally been regarded as bland and featureless.
The U.S. set a new target of reducing emissions by 26 percent to 28 percent by 2025, while China did not provided a specific target.
The Philae probe is apparently stable after making three attempts to land on the surface of a comet, and has sent back images.
Philae, the robotic craft, may have had a double landing due to malfunctions.
Regulations to curb power plant and tailpipe pollution, methane and refrigerants could help slash U.S. emissions.
New robotic “dolphin” technology has changed the way scientists collect data in isolated polar regions.
Right now, China produces the most carbon dioxide of any country in the world, having surpassed the U.S. in 2007.
The world’s two largest polluters have struck a deal to significantly reduce greenhouse gas outputs, but uncertainties remain.
The European Space Agency received confirmation of a successful comet landing at 11:03 a.m. EST.