WORLD WILDLIFE: Declining species may lead to ’empty landscape’

A group of scientists have said that the rapid trend of declining wildlife populations could lead to ’empty landscapes’, the science and environment team at British public broadcaster BBC has reported today. According to population figures published in the scientific magazine Science Advances, there has been a worrying 60 per cent drop in the number of large herbivores (plant-eating animals) such as giraffe, elephant and rhinoceros, leaving them at greater risk of extinction. The figures covered 74 herbivore species and attributed much of the decline to poaching and other forms of illegal hunting, as well as destruction of natural habitats. A study on large carnivores such as lions, tigers and wild dogs also … Continue reading WORLD WILDLIFE: Declining species may lead to ’empty landscape’

DEATH OF THE DINOSAURS: It may have been a speeding comet, US scientists say

Sixty-five million years ago, a massive object from outer space slammed into the Earth near what is now the Yucatan peninsula in modern-day Mexico. It released thousand of times the energy of an atomic bomb, leaving behind a crater more than 180 kilometres wide. The collision rained molten and pulverised rock over an area of more than 2,500 kilometres in diameter, creating devastating firestorms. It also caused worldwide temperatures to plummet as millions of tonnes of dust was thrown up into the atmosphere, blocking out the Sun for decades. As plants died off, the food chains that supported land dinosaurs … Continue reading DEATH OF THE DINOSAURS: It may have been a speeding comet, US scientists say