Global leopard population is on the decline and has lost 75% of its historic territory.
Ridley said Nasa's female employees 'continually inspire girls to enter the space programme'.
People in the UK and US will be able to see Mercury pass the Sun on 9 May
It is not known if collision with the bird actually caused the crash
Climate change is 'by far' the biggest factor behind mass bleaching event, Australian scientists say.
But they can't be 'destined' to be hunted officials warn.
Mystery of the hypothetical Planet 9 baffles scientists as they explore scenarios that support theory that it is real
A huge dust cloud will hike up the air pollution alert to "high", fuelled by south-easterly winds from the continent
Eta Aquarids to peak on 5 May with up to 60 meteors per hour visible from Southern Hemisphere.
The Middle East, North Africa, Central Asia, and parts of South Asia are predicted to be among the worst hit in the coming decades.
A new reading of the Rök runestone reveals a series of riddles about the monument itself.
Extreme temperatures will force millions of people to leave vast areas of the world.
Scientists pinpoint a genetic mutation that may explain breed's obesity issues.
Lake Maracaibo has more than 230 lightning flashes per square kilometre every year.
Archaeologists are 80-100% sure they've found the ship Captain Cook sailed to Australia in.
Study found three new species of mouse lemur in Madagascar; the smallest primates in the world.
Ingrained perceptions influence the way our brain processes people's faces.
Thirty-three lions that were rescued from circuses in Peru and Columbia have been airlifted to the Emoya Big Cat Sanctuary in South Africa.
An almost perfect picture of the genetic events that cause breast cancer have been discovered by scientists.
One trillion species may inhabit the Earth, often undiscovered by humans.
Scientists found at least two planets lying in the 'habitable zone' of their system, just 40 light years away.
Modern European ancestry traced back to early group of humans living in northwest of continent.
Dashcam footage shows marsupial leap onto car in Victoria, Australia.
Carp-specific herpes virus will be released into the Murray-Darling basin.
The mass tree-planting programme over the next decade will help restore wooded areas.
IBTimes UK looks at people who get recruited by cults and what tactics these groups employ to get followers.
A weasel caused a 'severe electrical perturbation' in the early hours of 29 April.
Gas is being expelled from the centre of two ultra-luminous x-ray sources in nearby galaxies.
More than 750 dogs roam across the hills at Territorio de Zaguates in Costa Rica.
Geological exploration of lake floor points to possible traces of the long-lost terraces.