Pakistan, April 18 -- Harvard astrophysicist John Brandenburg believes life once existed on Mars and was destroyed by a nuclear war. His theory, which originated in 2014, claims that Mars' red color is due to a thermonuclear explosion. He points to chemical elements on Mars that are similar to those found near nuclear test sites on Earth.

Brandenburg cites high levels of xenon-129 in the Martian atmosphere as evidence of this explosion. He notes that this gas is released during nuclear reactions and its concentration on Mars differs from other places in the solar system. He also mentions the presence of uranium and thorium on Mars' surface, supporting his claims.

NASA, however, remains skeptical of Brandenburg's theory. They found eleva...