Tornadoes in the USA
The outbreak of tornadoes that ravaged the southern US last week was the largest in the country’s recorded history. The three-day period from 25th-28th April saw 362 tornadoes strike. More than three hundred and seventy seven people have died and many are still missing. We ask Josh Wurman, President of the Centre for Severe Weather Research in Colorado, what made last month's storms so exceptional, how researchers like him are investigating tornadoes, and how much there still is to learn.
Why being overweight can cause dementia?
Being overweight or obese in mid-life could increase the risk of developing dementia in later life, scientists in Sweden have found. Previous studies have indicated a link between obesity and dementia, but this is the most comprehensive study to date to show an increased risk with just being overweight. But do we know why being overweight can affect memory? Dr. Simon Ridley, from Alzheimer's Research UK, joins us from Cambridge.
Mapping English Orchards
People’s Trust for Endangered Species (PTES) has completed a 5 year survey to map England’s traditional orchards - a UK Biodiversity Action Plan (BAP) Priority Habitat. The inventory provides for the first time an accurate picture of the number of traditional orchards remaining, as well as a county by county league table about their age and condition. We speak to Anita Burrough, the Orchard Project Officer at PTES.
Gravity Probe B Announcement
NASA first got involved with the Gravity Probe B (GP-B) space mission in 1963. The project was designed to test two predictions derived from Einstein’s Theory of Relativity. Yesterday NASA announced the results of this long running mission. We talk to Professor Tim Sumner from Imperial College, about whether Einstein got it right.
Weekly science conversation, on everything from archaeology to zoology, from abacus to the…