Neuroscientists artificially turn a mouse's fearful memory into a positive one, and vice versa.
A trial vaccine against Ebola could be tested on healthy volunteers in the UK in September, says an international health consortium.
Overnight earthquakes raise fears that magma from Iceland's Bardarbunga volcano could be heading towards another large volcanic system, scientists say.
Scientists produce a simple mathematical model that explains how a single sheepdog can herd a large number of sheep.
The climate impacts of the world's fossil-fuelled power plants are being underestimated because of poor accounting, say researchers.
A target number of badgers to be killed in this year's pilot cull to tackle tuberculosis in cattle is announced.
The last remaining population of the world's rarest bird, the Madagascar pochard, needs a new wetland home if it is to thrive again, a study reveals.
Harvard researchers develop a system to orientate small objects in any direction using magnetic levitation.
Europe's Rosetta mission, which aims to put a robot on a comet in November, has identified five potential sites for the touchdown.
Researchers say they have discovered more than 500 bubbling methane vents on the seafloor off the US east coast.
A whole functional organ has been grown from scratch inside an animal for the first time, say researchers in Scotland.
The European Space Agency says the latest two satellites for Europe's version of the US GPS sat-nav system have not gone into the correct orbit.
The next part of the hunt for the missing Malaysia Airlines jet MH370 will be very challenging in places, sea-floor mapping data suggests.
The hiatus in the rise in global temperatures is being caused by the Atlantic Ocean and could last another 10 years, say researchers.
Baby coral and fish can smell the difference between good and bad reefs, say marine ecologists.
Astronomers may have discovered the chemical signature of one of the Universe's earliest stars.
Ten groups have been chosen as finalists in a $10m (£6m) competition to develop a real-life "tricorder" - the medical scanner used in Star Trek.
US defence giant Lockheed Martin is teaming up with an Australian technology firm to track space debris that can damage multi-billion dollar satellites.
Scientists determine the comet being followed by Europe's Rosetta spacecraft to have a mass of 10 billion tonnes.
Nasa's Curiosity rover looks to examine another sample of Martian rock, but its drill test in a slab dubbed "Bonanza King" fails to complete properly.
A gift from the world-famous naturalist is to go on display in Copenhagen.
Four rare white lion cubs - three males and one female - are born at a circus on tour in eastern Germany.
Palaeolithic humans in Spain began eating snails 10,000 years earlier than their Mediterranean neighbours, a study reveals.
For the first time, biologists measure the force applied by climbing snakes and find that they squeeze up to five times harder than necessary.
Marine mammals brought tuberculosis to the Americas before the Europeans arrived, a study suggests.
A study finds a "considerable richness" of bee species in urban habitats, suggesting cities could help maintain healthy populations of the vital pollinators.
A new assessment from Europe's CryoSat spacecraft shows Greenland to be losing about 375 cu km of ice each year.
Part of the UK's problem with flooding is self-imposed, according to new research.
The risk of an eruption at Iceland's Bardarbunga volcano has increased, as well as the risk level to the aviation industry, meteorologists say.
Science dispels the popular myth that magpies like to steal shiny objects for their nests.