HealthThe body’s killer immune cells also feed fetuses in the womb Natural killer cells – which destroy cancer cells and pathogens – also help early fetuses grow, a finding that may lead to treatments to prevent miscarriage ¿ìè¶ÌÊÓÆµ
SpaceWe may have just seen the first comet from another solar system An icy comet just hurtled past the sun on a strange path that suggests it came from outside our solar system, making it the first such interloper we've ever spotted ¿ìè¶ÌÊÓÆµ