El sistema permite guardar información de hasta 72 bits, cuya integridad se mantiene a lo largo de las múltiples divisiones celulares.
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El hallazgo de una galaxia distante que se encuentra expulsando ingentes cantidades de gas podría obligar a reconsiderar por qué las grandes galaxias dejan de formar nuevas estrellas.
«Nothing I'd ever seen compares to it.»
If confirmed, this would be a very big deal.
The procrastination It is the habit of putting off things we should do, getting bogged down in less important tasks or even deliberately spending our time on things that we force ourselves to believe are more urgent.
But this defect is not only found in human beings, but other animals.
Procrastinating pigeons
James Mazur, Harvard-trained psychologist, has managed to indirectly demonstrate procrastination in animals, specifically in pigeons: he trained a group of them for two different work schedules and gave them the possibility of choosing the one they preferred.
Both had a candy as a reward after the same deadline, but the first one started with a little work and came after a long delay, while the second one started with a long delay and ended with much more work (up to four times more).
Basically, the pigeons had to choose between working a little first, then resting, or taking it easy first, and then face harder work.
We already know what most of us would do, but curiously the pigeons also opted for the same strategy, as explained Piers Steel in his book Procrastination:
They postponed the afternoon despite the fact that much more arduous work awaited them to obtain the reward in the end. (…) The birds leave it until later and even the chimpanzees at the zoo leave it until later.
When it comes to procrastinating, then, almost all animals are cut from the same cloth.
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The news
Animals can also procrastinate just like humans do.
was originally published in
Xataka Science
by
Sergio Parra
.
The year 2021 is expected to be the shortest in decades. The last time an average day was less than 86,400 seconds in a full year was in 1937.
According to the calculations, an average day in 2021 will be 0.05 milliseconds shorter than 86,400 seconds. Throughout the year, atomic clocks will have accumulated a lag of about 19 milliseconds.
Accelerated rotation
The length of an average solar day can vary in milliseconds (1 millisecond equals 0.001 seconds). But Earth's rotation speed varies constantly due to the complex motion of its molten core, oceans and atmosphere, as well as other effects. Official measurements of day length are made by the International Earth Rotation and Reference Systems Service (IERS).
To determine the actual length of a day, IERS scientists determine the exact speed of Earth's rotation by measuring the precise times a fixed star passes a given location in the sky each day. This measure is expressed as Universal time (UT1), a type of solar time.
Before 2020 began, for example, The shortest day since 1973 was July 5, 2005, when the Earth's rotation took 1.0516 milliseconds less than 86,400 seconds.
However, in mid-2020, lEarth broke that record no less than 28 times. The shortest day of all came on July 19, when Earth completed its rotation in 1.4602 milliseconds short of 86,400 seconds. 2021, if the calculations are confirmed, will break this record.
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The news
The year 2021 will be the shortest in decades: the Earth has been rotating more rapidly lately
was originally published in
Xataka Science
by
Sergio Parra
.
Con prácticamente una semana de antelación, los modelos numéricos de previsión atmosférica que maneja la Agencia Estatal de Meteorología (Aemet) ya indicaban que algo raro y de gran impacto se iba a producir en España. Y se cumplió. Filomena ha sido la…