What is the universe made out of?

How should we define death?

17 astounding scientific mysteries that researchers canโ€™t yet solve.

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Webresearchers have discovered the cause of the brightest burst of light ever recorded.

Weban australian scientist says probabilities are the leading cause of the bermuda triangle disappearances.

Add in suspect weather,.

Webfrom a waterfall that disappears into nowhere to odd jelly blobs that fall from the sky, the mechanics behind these natural phenomena are some of nature's best kept.

Webin exploring these stories, weโ€™ve learned some of the surprising reasons why major scientific mysteries can go unsolved for years or even decades:

But in doing so they have run up against two bigger mysteries, including one.

Weba nasa probe into hundreds of ufo sightings found there was no evidence aliens were behind the unexplained phenomena, but the space agency also could not.

Webevery few years, a story goes viral claiming that experts have finally 'solved' the bermuda triangle mystery.

Webpaleogenetics teases out astonishing secrets from dna hidden in bones and dirt.

Some are due to.

Maybe it's strange hexagonal clouds acting as air.

Artificial intelligence decodes ancient texts written in forgotten scripts.

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Government report on ufos says it found no evidence of aliens but acknowledged 143 reports of unidentified aerial phenomena since 2004 that could not.

And heโ€™s not the only one.