The latest stories from the Science & Environment section of the BBC News web site.
Updated: 10 min 17 sec ago
Temperatures plunge as England, Wales and Northern Ireland record their lowest temperatures of 2014, BBC Weather says.
The stories that made an impact in archaeology this year
Old Christmas trees are being put to use by the Environment Agency as flood defences on riverbanks and shorelines.
How planning and rapid response can mitigate tsunami effects
How Ebola compares with other diseases and outbreaks
Whooping cough may be evolving to outsmart current vaccines and could result in "serious consequences", warn researchers.
The most stunning space photos of 2014
A year of incredible highs and devastating lows.
A collection of some of the best reads from the BBC
Science highlights of the year in images
Science and environment news highlights from 2014
Meet the insects that made Christmas
Home Secretary Theresa May's plan to expel foreign graduates draws criticism from the scientific community.
Nasa's "X-ray eye", designed to study distant galaxies and black holes, has turned its attention to our own star and snapped a remarkable portrait.
Extremely cold temperatures have frozen parts of the Hukou waterfall on the Yellow River in north-west China.
A new study suggests that the trade in parts of tigers and other wild cats from Myanmar into China is growing.
A mystery still unsolved by science
Zoo keepers from around the world are due to meet next month to discuss ways to save the endangered northern white rhino.
Millions of monarch butterflies have arrived in Mexico's forests as part of their annual migration from Canada and the United States.
Aerial photographs from the 1940s and 1950s are being used to probe the climate history of the Antarctic Peninsula.