Building a coffee business?

Serving the best Americano in town is up to you.

But winning back time and growing your business, leave that to sum-up. Take orders and payments anywhere with the new SumUp terminal. Turn occasional customers into regulars with a free loyalty program. And with the SumUp point-of-sale system, you'll always know when you're running low on your best-selling blends. Visit sumup.com.com.com. to learn more.

This is John Batchel,

conversation with my colleague

Bob Zimmerman about your best-selling blends. Visit sumup.co.uk to learn more. This is John Batchel, conversation with

my colleague Bob Zimmerman about new information, the effect of weightlessness, extended periods

of weightlessness. We knew that it made bones brittle so much so that you routinely see when

astronauts or cosmonauts or tekanauts return to Earth,

they're put it in chairs and carried around because their bones are either brittle or very, very weak.

Very weak. Everything is weak. There's also effect upon the eyesight, we're told. Other effects

that we're off after time, we're told.

However, Bob here reports on one that is fundamentally dangerous,

which is stem cells being damaged or aged out.

Any effect on stem cells?

Now, is there recovery?

Perhaps partial, but that would not be thrilling to volunteer into a partial damage to your stem cells.

What is to be done is the focus.

Here's Bob to explain what the problem is.

More of this tonight.

Yes, one of the things that we face if we want to go to Mars is that you're going to be in

with present technology, you're going to be in waitlessness for six months at least to get

...