Necrop­oli Grot­ti­cel­li, the tomb of Archimedes in Syra­cuse

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Greek math­e­mati­cian, physi­cist, engi­neer, inven­tor, and astronomer Archimedes made many great sci­en­tif­ic dis­cov­er­ies through­out his life. He explained why and how bod­ies float in the water, designed mir­ror arrays capa­ble of focus­ing sun rays and set­ting ene­my ships on fire, found the way of approx­i­mat­ing the num­ber of grains of sand that will fit inside the uni­verse.

Now to the brain teas­er part.

His tomb was dec­o­rat­ed with his favorite dis­cov­ery. Which one of the fol­low­ing three sculp­tures was hon­or­ing Archimedes, and why?

1. A gold­en crown com­mem­o­rat­ing his famous Eure­ka moment in the bath
2. A lever with which he promised one could move the Earth
3. A sim­ple cylin­der and a sphere

The puz­zle answer is below. Please think about it before check­ing it out… Read the rest of this entry »

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Online brain games can extend in-game ‘cog­ni­tive youth’ into old age (Sci­ence News):

“A Uni­ver­si­ty of Cal­i­for­nia, Irvine-led study has found that online brain game exer­cis­es can enable peo­ple in their 70s and even 80s to mul­ti­task cog­ni­tive­ly as well as indi­vid­u­als 50 years their junior. This is an increas­ing­ly valu­able skill, giv­en today’s dai­ly infor­ma­tion onslaught, which can divide atten­tion and be par­tic­u­lar­ly tax­ing for old­er adults Read the rest of this entry »

Bioethi­cists call for over­sight of poor­ly reg­u­lat­ed, con­sumer-grade neu­rotech­nol­o­gy prod­ucts (Med­ical News):

“The mar­ket­ing of direct-to-con­sumer “neu­rotech­nolo­gies” can be entic­ing: apps that diag­nose a men­tal state, and brain devices that improve cog­ni­tion or “read” one’s emo­tion­al state. How­ev­er, many of these increas­ing­ly pop­u­lar prod­ucts aren’t ful­ly sup­port­ed by sci­ence and have lit­tle to no reg­u­la­to­ry over­sight, which pos­es Read the rest of this entry »

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(More on the pos­i­tive side, at MIT Tech­nol­o­gy Review) The smart­phone app that can tell you’re depressed before you know it your­self:

“There are about 45 mil­lion peo­ple in the US alone with a men­tal ill­ness, and those ill­ness­es and their cours­es of treat­ment can vary tremen­dous­ly. But there is some­thing most of those peo­ple have in com­mon: a smart­phone Read the rest of this entry »

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Lim­it­ing chil­dren’s screen time linked to bet­ter cog­ni­tion, study says (CNN):

“Lim­it­ing kids’ recre­ation­al screen time to less than two hours a day, along with suf­fi­cient sleep and phys­i­cal activ­i­ty, is asso­ci­at­ed with improved cog­ni­tion, accord­ing to a study pub­lished in The Lancet Child & Ado­les­cent Health.

The study includ­ed about 4,500 US chil­dren ages 8 to 11 and mea­sured their habits against the Cana­di­an 24-Hour Move­ment Guide­lines for Chil­dren and Youth. It found that Read the rest of this entry »