成人快手

Some older people who have had a heart attack or stroke take a daily low-dose aspirin to reduce their risk of having another one. But a new study this week shows that the drug increases the risk of internal bleeding. Claudia Hammond speaks to Peter Rothwell, Professor of Neurology at the University of Oxford.

Earth鈥檚 Earliest Animals
Dickinsonia were strange creatures, ranging from a few millimetres to over a metre in diameter. These oval 鈥榪uilted鈥� mattress-like animals swam in ancient seas over 571 million years ago. Roland Pease speaks to Associate Professor Jochen Brocks of the Australian National University in Canberra who has been studying a well-preserved fossil.

4D Printing Biology
4D printing allows 3D objects to can change shape reacting to external inputs such as pressure, temperature, light or other environmental stimuli, making 4D printed creations interactive. Researchers in Wellington, New Zealand are using biology as inspiration for their 4D designs. Simon Morton reports.

Weighing Water from Cyclones and Hurricanes
When storms such as Hurricane Florence or Typhoon Mangkhut hit land, they bring extraordinary amounts of water in the form of rain. The strong winds cause havoc, but it is the subsequent flooding and storm surges that are often responsible for the most fatalities and financial losses. By studying what happened to the water in Texas last year when Hurricane Harvey made landfall, scientists hope to get a better idea for flood mitigation strategies and flood preparation. And to do this they measure location, flow and amount of water on land using GPS measurements. Chris Milliner, from Nasa鈥檚 Jet Propulsion Laboratory explained more to Roland Pease.

Effects of Hookah Smoking in Adults Aged 18 to 34
Although they originated in the Middle East, hookah pipes or shisha are increasing in popularity in places such as the US. Many believe it is less harmful than smoking cigarettes, but new research on 18-34 year old hookah smokers has found that even a single session can cause stiffening of the walls of the arteries. Claudia Hammond talks to research author Dr Mary Rezk-Hanna, Associate Professor at the University of California.

The Lost Levels
Dan Hett鈥檚 鈥淭he Loss Levels鈥� appears as part of the Alternate Realities tour at the Brighton Digital Festival. 鈥淭he Loss Levels鈥� is a deeply personal and experimental arcade game that narrates the artist鈥檚 experience in 2017 when he lost his brother in the Manchester Arena terror attack. Gareth Mitchell hears more.

What鈥檚 The Point of Laughter?
This violent and repetitive involuntary constriction of the chest muscles is highly infectious, and can result in convulsions, profuse tears and a reddening of the face. People are known to clutch their chests or roll around on the floor during the more intense bouts. But why? Geoff Marsh asks neuroscientist Professor Sophie Scott from University College London.

(Picture caption: Elderly person taking pills with a glass of water 鈥� credit: Getty Images)

The Science Hour was presented by Marnie Chesterton with comments from 成人快手 Science reporter Katie Silver

Producer: Katy Takatsuki

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