This is the second contact after seven months of hibernation.
Pontiff slams dependence on fossil fuels, calls for urgent action
World Wildlife Fund welcomes decision to use iconic Manhattan landmark.
The Beijing Family is the most successful genotype of Mycobacterium tuberculosis.
Extreme climate change may solve mystery of absence of big Triassic dinosaurs in tropics.
Sounds previously believed to have been magma seeping through the Earth's crust
SharkBytes app lets people search for attacks and incidents via GPS
Supersonic car to make debut ahead of 1,000 mph bid next year.
Philae which is resting on comet 67P has woken up from a seven-month slumber.
The World Energy Outlook Special Report details the steps for energy peaking and a climate pact success.
A traditional-dish in north-east Thailand, made from raw fish, has been found to be behind a high incidence of liver cancer in the area.
European Space Agency (Esa) announced that its comet lander Philae has contacted Earth.
Liberate Tate group aims to cover the hall's 152-metre floor with thousands of words about the dangers of fossil fuels.
Revolutionary Spinali Bikini sends alerts to smartphones warning the user to seek shade.
Personal letters written to his son about the theory of relativity sells for $62,500
Wheat and rice crops show poor nitrogen absorption under high carbon levels.
Some scientists believe full brain emulation isn't so far away
Pictures of Pluto show dwarf planet has very bright and very dark terrain.
Greyscale is highly contagious and frequently fatal.
Conspiracy theorists had warned about Earth's impending doom
Scientists discover two sea monsters feasting on each other 2,000m below Antarctic surface.
Award-winning photograph shows American horned frog can swallow very large prey.
"[We'd go] up at about four bombs per second all the way to Mars and then to Jupiter and Saturn"
China has taken millions of high-polluting vehicles off the roads and they now lie in huge scrap yards.
Molecules that absorb light were believed to be rare on hot planets.
Apart from settling some aspects of the REDD programme, nothing much achieved at Bonn.
There's a deeply rooted tendency in the brain to view nature as designed, say researchers.
Terry Virts, Samantha Cristoforetti and Anton Shkaplerov touched down safely aboard a Russian Soyuz
As of earlier this month, 16 new Ebola cases were reported in Guinea and 15 in Sierra Leone
Palaeontologist Dean Lomax talks Jurassic World and how real dinosaurs compare.