As far as we know today, this is true. It may not always be the case. Besides, you say this not from experience and observation, but because you believe what others have told you.
If you want people to believe otherwise, the burden of proof is rightly yours.
Besides, you say this not from experience and observation, but because you believe what others have told you.
The results and the work that produced them are available for anyone to verify for themselves - nobody asks that science be taken on faith, least of all scientists.