"You just had to ignore the fear in your gut and push it away, become someone else," recalls one Jewish survivor, now 94. "I had to act like a regular Berliner. And this is what saved me in the end."
A study of 5 million years of mollusks suggests that laziness could be a good survival strategy: species that have gone extinct had higher metabolic rates than the ones that exist today.
It's the third anniversary of the Ebola pandemic; 2014 was a catastrophic year. But one family in Liberia gave health workers a reason to celebrate.