On Wednesday night skywatchers were treated to the unusual sight of a ‘blood moon’. We’ve select some of your best shots »

Photo: Πανδώρα Άγαδακις

Scientists say milk first is the correct way to make a cup of tea (although this writer disagrees). They say adding the milk after boiling water causes it to heat unevenly, denaturing the proteins and affecting the taste. Our Adam Gabbatt demonstrates the best method. The longer the brew, the better! 

Which countries are responsible for climate change?

Country sizes show the eventual CO₂ emissions from oil, coal and gas extracted each year. Many of these fuels are exported rather than used domestically, but arguably the countries extracting and selling fossil fuels bear a degree of responsibility for the resulting emissions.

See who is most vulnerable to global warming’s impacts »

Mars was once awash with water. There are two possibilities. Either the water seeped down into the interior, or it was driven into space

As Nasa’s Maven mission arrives at the red planet, we may finally be close to working out where it all went. Read more »

Illustration: AP

What sort of data do black boxes store – and how do they survive a plane crash?

More video »

Experts say a giant panda previously thought to be pregnant may have been more focused on food than giving birth.

“[pregnant pandas] receive more buns, fruits and bamboo, so some have used this to their advantage to improve their quality of life”

Pandering to the crowd » 

Photo: STR/AFP/Getty Images

Experimental Ebola vaccine to be tested on humans

An experimental Ebola vaccine by GlaxoSmithKline could be tested on patients in the US as soon as next week. 

Researchers are looking to establish whether the drug for humans works in a similar way to how it works in animals.

Correction, 28 Aug: We initially said an “Experimental Ebola” was to be tested on humans, instead of an “experimental Ebola vaccine”. 

Ebola: airlines have cancelled flights to infected countries, while fear and false alarms put Europe on high alert

A health worker disinfects a corpse after the man died in a classroom being used as a temporary Ebola isolation ward (John Moore/Getty). 

Sea plankton have been found on the International Space Station – but how did they get there?

If the science side of Tumblr can’t explain it, read this

Ebola outbreaks: 1976 to now – interactive map

Over 900 people have died in West Africa in the latest outbreak, which has been declared an international health emergency by the World Health Organisation. This map shows the history of Ebola, from the first case in 1976 to the latest outbreak.