Bart Leahy
How Life on Earth Could Destroy Life on Mars
Could a virus or microbe from Earth screw up another planet's biosphere before we even discover it? Or could a Martian microbe brought back for scientific study spread an Andromeda Strain type of illness on Earth and wipe out humanity?
Does an Ocean on One of Saturn's Moons Mean We'll Find Alien Space Fish There?
Recent research found evidence of a liquid-water ocean on Enceladus, which leads to big questions about our search for life elsewhere in the solar system.