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Tag: extinction

Paleontologists find evidence of new mass extinction 233 million years ago

Paleontologists find evidence of new mass extinction 233 million years ago

Science
Sept. 16 (UPI) -- Paleontologists have unearthed evidence of a new mass extinction that occurred during the Late Triassic, some 233 million years ago. The extinction event, which scientists dubbed Carnian Pluvial Episode, was characterized by significant reductions in biodiversity and the loss of 33 percent of marine genera. Advertisement In a new paper, published Wednesday in the journal Science Advances, researchers suggest the episode may have created the ecological space for the emergence of a variety of important modern plant and animal lineages -- including conifers, insects, dinosaurs, crocodiles, lizards, turtles and mammals. Through analysis of both paleontological assemblages and geological evidence, researchers confirmed that biodiversity declines coincided with stark chemical ...
Extinction: Urgent change needed to save species, says UN

Extinction: Urgent change needed to save species, says UN

Science
Humanity is at a crossroads and we have to take action now to make space for nature to recover and slow its "accelerating decline".This is according to a report by the UN Convention on Biological Diversity. It sets out a bullet point list of eight major transitions that could help stop the ongoing decline in nature. "Things have to change," said Elizabeth Maruma Mrema, the convention's executive secretary. "If we take action, the right action - as the report proposes - we can transition to a sustainable planet." What's the link between exploiting nature and human health?New diseases emerge in the human population probably three or four times every year. It is only when...
Sir David Attenborough makes stark warning about species extinction

Sir David Attenborough makes stark warning about species extinction

Science
Media playback is unsupported on your device Sir David Attenborough returns to our screens this weekend with a landmark new production.The tone of the programme is very different from his usual work.For once Britain's favourite naturalist is not here to celebrate the incredible diversity of life on Earth but to issue us all with a stark warning. The one-hour film, Extinction: The Facts, will be broadcast on BBC One in the UK on Sunday 13 September at 20:00 BST. "We are facing a crisis", he warns at the start, "and one that has consequences for us all."What follows is a shocking reckoning of the damage our species has wrought on the natural world. Scenes of destructionThere are the stunning images of animals and plants you would expect from an...
New global extinction target proposed

New global extinction target proposed

Science
The world needs a single goal for fighting the loss of nature, much like the 1.5C target for climate change, according to conservation experts.Extinctions of plants and animals should be kept well below 20 per year, they propose.Last year, a UN report found that around one million species are now threatened with extinction. Progress on biodiversity loss has been "far too slow, limited or ineffective," said Prof Georgina Mace of UCL, London.Nature crisis: Humans 'threaten 1m species with extinction'Achieving the target should ensure that natural systems "continue to function and meet the needs of people and the rest of life on Earth", she said.The coronavirus pandemic has put the spotlight on the critical balance between nature an...
Heirloom plants: Saving the nation’s seeds from extinction

Heirloom plants: Saving the nation’s seeds from extinction

Science
The battle of the Somme in 1916. A British soldier fighting in France is given seeds as a memento of happier times. When he returns home, he plants them in the soil. His family and friends carry on the tradition, and, today, you can still find the Blackdown Blue pea growing somewhere in Somerset. Catrina Fenton, head of the Heritage Seed Library in Coventry, rests the seeds in her hand. "People like to grow something that's got a bit of history behind it," she says. "A lot of the varieties in our collection have got wonderful stories; they relate to a particular place, or they taste a bit like the tomatoes their grandfather used to grow."She shakes black and cream beans from another envelope on to her palm. Legend has it that se...