Here's Stephen Hawking's last scientific paper and all about it

She worked with Stephen in the department of Applied Mathematics and Theoretical Physics at the University of Cambridge. This essentially means that we can't see a black hole directly. In fact, most galaxies - the Milky Way included - are thought to be held together by the gravity of supermassive black holes with masses millions of times that of the sun, which lie at the galactic center. According to him, when hot objects exert heat into space, the ultimate fate of a black hole is to evaporate out of existence. According to the laws of quantum mechanics, matter can not simply disappear without leaving behind information of its previous state. The laws of physics dictate that no information should be lost: If information existed in the past, we should be able to recover it.

There is still much unknown about how these soft hairs store information and whether they store all or only some of the information gobbled up by black holes. But after 60 years, Hawking has argued about this as by saying that black holes have the temperature in them. The study proposed that some information from matter that gets pulled into a black hole can be retrieved from photons that escape from the event horizon.

If an object is put into a black hole, the hole's temperature is bound to be affected as well as its entropy, a measure of an object's internal disorder.

In 1974 Hawking made the landmark conjecture that black holes do not simply suck in everything, but rather behave as black bodies that emit radiation as well as absorbing it. This is the "no-hair" theorem, the idea being that like bald heads, black holes have few features to distinguish themselves.

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In the latest paper, Hawking and his colleagues show how some information at least may be preserved.

Two years later, Perry and Strominger, now aided by Cambridge physicist Sasha Haco, have finished and released the next and final step of Hawking's work on the matter entitled Black Hole Entropy and Soft Hair revealing that that soft hair may allow for the recovery of some information from black hole objects. The physicists conclude that their result agrees with Hawking's original calculation of black-hole entropy. The study claims that some information from the black hole might be recorded by photons.

The paper has been published by the Cornell University Library.

Writing for The Guardian, Perry described the most recently published work as "perhaps the last paper that Stephen was involved in", but there may be more out there.

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