Elephant poaching rates in Africa have started to decline after reaching a peak in 2011, an international team of scientists has concluded. But the continent’s elephant population remains threatened.
Apples originally evolved in the wild to entice ancient megafauna to disperse their seeds. More recently, humans began spreading the trees along the Silk Road with other familiar crops. Dispersing the apple trees led to their domestication.
Supernovae bombarded Earth with cosmic energy starting as many as 8 million years ago, with a peak some 2.6 million years ago, initiating an avalanche of electrons in the lower atmosphere and setting off a chain of events that feasibly ended with bipedal hominins.