1st Extinction
The Ordovician Era
443 million years ago 85% of all species went extinct Reasons: An ice age“ followed by a rapid warming
2nd Extinction
The Devonian Age
374 million years ago 75% of all species went extinct Reasons: Fluctuating sea levels, altering global cooling and warming, drop in Co, concentration and periods of low oxygen
3rd Extinction
The Permian Age
250 million years ago 95% of all species went extinct Reasons: An asteroid hit the planet, filling the air with pulverised particles, leading to inhabitable climate conditions
4th Extinction
The Late Triassic Age
200 million years ago 80% of all species went extinct Reasons: Some colossal geological activity in the today's Atlantic Ocean that resulted in high CO,, global warming and acidified oceans
5th Extinction
Cretaceous Period
65 million years ago 76% of all species went extinct Reasons: Meteor crash in the Yucatan peninsula in Mexico, high volcanic activity
6th Extinction
The Holocene Epoch
About 99% of the planet's species have been lost in the previous five mass extinctions
Ongoing
Reasons: Anthropogenic factors like climate change and introduction of invasive plant species
Esta historia es de la edición March 16, 2022 de Down To Earth.
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Esta historia es de la edición March 16, 2022 de Down To Earth.
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In leading role again
MOVIES AND WEB SERIES ARE ONCE AGAIN BEING SET IN RUSTIC BACKGROUNDS, INDICATING A RECONNECT BETWEEN CINEMA AND THE COUNTRYSIDE
One Nation One Subscription comes at a huge cost
As top US universities scrap big deals with top scientific publishers, India’s ONOS scheme seems flawed and outdated
Return of Rambhog
Bid to revive and sell the aromatic indigenous paddy variety has led to substantial profits for farmers in Uttar Pradesh's Terai region
Scarred by mining
Natural springs of Kashmir drying up due to illegal riverbed mining
Human-to-human spread a mutation away
CANADA IN mid-November confirmed its first human case of avian influenza, with a teenager in the British Columbia being hospitalised after contracting the H5N1 virus that causes the disease. The patient developed a severe form of the disease, also called bird flu, and had respiratory issues. There was no known cause of transmission.
True rehabilitation
Residents of Madhya Pradesh's Kakdi village take relocation as an opportunity to undertake afforestation, develop sustainable practices
INESCAPABLE THREAT
Chemical pollution is the most underrated and underreported risk of the 21st century that threatens all species and regions
THAT NIGHT, 40 YEARS AGO
Bhopal gas disaster is a tragedy that people continue to face
A JOKE, INDEED
A CONFERENCE OF IRRESPONSIBLE PARTIES THAT CREATED AN OPTICAL ILLUSION TO THE REALITY OF A NEW CLIMATE
THINGS FALL APART
THE WORLD HAS MADE PROGRESS IN MITIGATING EMISSIONS AND ADAPTING TO CLIMATE IMPACTS. BUT THE PROGRESS REMAINS GROSSLY INADEQUATE
