Probably most of us are aware that plants take sunlight and use it to “fix” carbon from carbon dioxide (CO2) in the atmosphere into sugar compounds by the process of photosynthesis. In fact, natural photosynthesis removes about 100 billion tonnes of CO2 from the atmosphere every year. The natural release and absorption of CO2 is balanced – but humans are releasing over 30 billion tonnes per year on top of that, which is increasing the CO2 in the atmosphere and causing global warming; this exceeds the ability of plants to remove it. But what if we could find a way to make carbon fixation more efficient? Now, a team of researchers have done just that. Continue reading
How much of human violence is innate, and how much of it is shaped by our environments? Are we a uniquely violent species? These are questions philosophers and social scientists have tried to answer for centuries. Now researchers have done an evolutionary comparison – and conclude that the rate of lethal human violence is six times that of the average mammal…but about average for a great ape.