Francisco Hernández En Salud y cuerpo humano

Why do we cover our mouths when startled or shocked?

Not to prevent our souls leaving our bodies, as some traditions would have it. The gasp which causes our mouths to open…
Francisco Hernández En Planeta Tierra

What caused the Big Bang?

The big bang is the moment that space and time (or ‘spacetime’) came into existence. Before the Big Bang there was no sp…
Francisco Hernández En Salud y cuerpo humano

Why don’t we sneeze in our sleep?

During REM sleep (the phase where dreams take place), your muscles are paralysed so that you don’t thrash around and hur…
Francisco Hernández En Planeta Tierra

Have we made any difference to climate change yet?

Quite possibly – but not in a good way. The principal drivers of climate change are greenhouse gases that trap the Sun’s…
Francisco Hernández En Planeta Tierra

How big could an animal get?

Based purely on the physical strength of bone and muscle, it has been calculated that land animals of at least 100 tonne…
Francisco Hernández En Planeta Tierra

Can stars collide?

In general, distances between stars are so vast that it is unlikely that any two will ever meet and collide. But in some…
Francisco Hernández En Planeta Tierra

Could we grow plants without sunlight?

YES. At the Stockbridge Technology Centre in North Yorkshire (pictured), scientists are using the principle that plants …

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