Science reaches new highs - and lows and pasts and futures - in 2015

It's been an action-packed 2015 in science, from a breakthrough for peanut allergy sufferers to new discoveries of ancient humans and a possible alternative Earth in outer space.We take a look back at some of this year's most notable moments in science.Australian scientists started the year with a bang - or maybe it was a crunch.World-first research at Melbourne's Murdoch Institute discovered a way to reduce the potentially deadly peanut allergy for sufferers, by actually feeding them the nut protein.Lead researcher Associate Professor Mimi Tang said there's more to do but the potential benefits can be huge.

An artist's concept depicting Kepler-186f, the first validated Earth-size planet to orbit a distant star in the habitable zone (NASA)-1 Source: An artist's concept depicting Kepler-186f, the first validated Earth-size planet to orbit a distant star in the habitable zone (NASA)-1