A 12ft-long python found on the Norfolk Broads has still not been found.
BBC News
Norfolk Broads python discovery mystery
Farm subsidies 'must be earned' - Michael Gove
Environment Secretary Michael Gove plans to pay farmers for protecting the environment and creating rural jobs.
Moon dust bag sold for $1.8m at New York auction
The bag was used by astronaut Neil Armstrong to collect the first ever samples of the Moon in 1969.
New Mexico boy trips over 1.2 million year old fossil
A 10-year-old boy's stumble unearthed a prehistoric skull, which he then got the chance to help excavate.
Black-winged stilts: Record year for UK breeding
The number fledging from the UK in 2017 is more than the total number for the previous 30 years.
Elephant seals 'recognise vocal rhythm'
Male elephant seals recognise the rhythm of one another's voices, researchers say.
US Republican asks Nasa if civilisation on Mars existed
A US congressman asked scientists if the Red Planet could have been occupied "thousands of years ago".
Poaching pushes pangolin closer to extinction
Pangolins in the forests of Africa are at risk of being pushed to extinction like their Asian relatives.
Australia human history 'rewritten by rock find'
Research shows Aboriginal people entered Australia up to 18,000 years earlier than thought.
Why dogs are friendly - it's written in their genes
Being friendly is in dogs' nature and could be key to how they were domesticated from wolves.
UK rhino eggs 'could save last northern whites'
A UK zoo is taking part in a radical plan to save the world's last northern white rhinos from extinction.
How did dogs become our best friends? New evidence
Dogs were tamed from a single wolf population between 20,000 and 40,000 years ago, a study suggests.
LISA Pathfinder: Time called on Europe's gravity probe
The European Space Agency turns off one of its most successful ever missions - LISA Pathfinder.
Scottish osprey chicks moved to Spain
The birds were collected under licence for translocation to a part of Spain where they have not bred for years.
Mighty T. rex 'walked rather than sprinted'
New research suggests the dinosaur could go no faster than a very brisk walking pace.