Our evolution could have gone in different directions a lot of times. We could have gone extinct at some points. We might not have gotten our big brains, or Neanderthals might have made it while we did not. Sam Kean bigbraindirection share on social
The hippocampus helps record both types of memories initially, and it helps retain them for the medium term. The hippocampus also helps us access old personal memories in long-term storage in other parts of the brain. Sam Kean accessbrainhelp share on social
Junk DNA - or, as scientists call it nowadays, noncoding DNA - remains a mystery: No one knows how much of it is essential for life. Sam Kean calldnaessential Change image and share on social
Even fictional characters sometimes receive unwarranted medical opinions. Doctors have diagnosed Ebenezer Scrooge with OCD, Sherlock Holmes with autism, and Darth Vader with borderline personality disorder. Sam Kean autismborderlinecharacter share on social
Geneticists in the early 1900s believed that nature - in an effort to avoid wasting precious space within chromosomes - would pack as many genes into each chromosome as possible. Sam Kean 1900savoidbelieve Change image and share on social
Those of us raised in modern cities tend to notice horizontal and vertical lines more quickly than lines at other orientations. In contrast, people raised in nomadic tribes do a better job noticing lines skewed at intermediate angles, since Mother Nature tends to work with a wider array of lines than most architects. Sam Kean anglearchitectarray share on social
We human beings are humane in part because we can look beyond our biology. Sam Kean beingbiologyhuman Change image and share on social
The grand saga of how humans spread across the globe will need some amendments and annotations - rendezvous here, elopements there, and the commingling of genes most everywhere. Sam Kean amendmentannotationcommingle Change image and share on social
Microchimeric sharing means that, even if the mother loses a child, she'll have a small memento of him or her secreted away inside her. Similarly, a bit of our mothers live on in all of us no matter how long ago Mom died. Sam Kean agobitechild share on social
We really should be grateful to the people who participate in research and allow certain details to be published about themselves. Because if they didn't, we wouldn't have nearly the understanding of the brain that we do. Sam Kean braindetailgrateful share on social