Five times in our planet's history, adverse conditions have extinguished most of life.

Now, scientists say, life on Earth could be in trouble again, with some even saying we could be entering a sixth mass extinction.

No credible scientist disputes that we are in a crisis regarding the speed at which nature is being destroyed.

But could we really be on track to lose most life on Earth?

Human-caused climate change, changes in land use and pollution are rapidly transforming the planet, making it harder for species to adapt and survive.

Mr Ahmed is suspected of trying to traffic rhinoceros horn and ivory

Kenyan police have arrested a man suspected of links to a transnational wildlife and drug trafficking syndicate who was indicted in a US court.

Abdi Hussein Ahmed, alias Abu Khadi, was detained on Tuesday in the central county of Meru after a tip-off from the public, police say.

Catastrophic climate change outcomes, including human extinction, are not being taken seriously enough by scientists, a new study says.

The authors say that the consequences of more extreme warming - still on the cards if no action is taken - are "dangerously underexplored".

They argue that the world needs to start preparing for the possibility of what they term the "climate endgame".

They want UN scientists to investigate the risk of catastrophic change. According to this new analysis, the closest attempts to directly understand or address how climate change could lead to global catastrophe have come from popular science books such as The Uninhabitable Earth and not from mainstream science research.

Namibia has one of the world's largest populations of cheetahs

For the first time in 70 years, India's forests will be home to cheetahs.

Eight of them are set to arrive in August from Namibia, home to one of the world's largest populations of the wild cat.

Their return comes decades after India's indigenous population was declared officially extinct in 1952.

The world's fastest land animal, the cheetah can reach speeds of 70 miles (113km) an hour.

Australia has suffered a litany of natural disasters in recent years including historic bushfires

Australia's environment is in a shocking state and faces further decline from amplifying threats, according to an anticipated report.

The survey of Australia's ecological systems - conducted every five years - found widespread abrupt changes.

These can be blamed on climate change, habitat loss, invasive species, pollution and mining, it said.

The threats are not being adequately managed - meaning they are on track to cause more problems.