The latest stories from the Science & Environment section of the BBC News web site.
Updated: 6 min 55 sec ago
A tree frog that feeds its young unfertilised eggs and was thought to have died out more than a century ago has been rediscovered in India.
Scientists studying birds in the Himalayas discover that one species of thrush is in fact two.
Exposure to toxin from algae linked to dementia
Nevada desert home to ambitious transport project
Nasa's chief scientist says she is a bit "sceptical" about the existence of a ninth planet in our Solar System.
Global temperatures in 2015 were the warmest on record, according to data published by meteorologists in the UK and US.
A 201-million-year-old dinosaur that fell out of a cliff face in Wales in 2014 is formally named Dracoraptor hanigani - the "dragon thief".
American astronomers say they have strong evidence that there is a ninth planet in our Solar System orbiting far beyond even the dwarf world Pluto.
Five planets will align across the dawn sky on Wednesday in a rare treat for skywatchers.
Global temperatures in 2015 were the warmest since records began, according to data published by meteorologists in the UK and the US.
What is China doing to clean its air?
Do beards hold the key to new antibiotics?
Images from an unmanned aerial vehicle suggest excessive management of floodplains limit their ability to hold water and slow the flow of floodwater.
Residents of one of Germany's foremost car manufacturing bases are urged to leave their vehicles at home after smog breaches maximum safe levels.
The present-day English owe about a third of their ancestry to the Anglo-Saxons, according to two new studies.
The amount of fish taken from the world's oceans has been underestimated by more than 50% according to a new study.
A company producing GM mosquitoes says it is to open a new factory in Brazil as it expands its operations.
A private UK fertility clinic is offering couples a new form of IVF treatment that allows conception to occur in the womb rather than in the lab.
This is the moment an unmanned SpaceX Falcon rocket exploded on landing after successfully delivering an ocean monitoring satellite to orbit.
Jason-3, a US-European satellite that is fundamental to our understanding of the oceans, is launched from California.