3 MAY: Lulu the killer whale was found dead on a beach in Scotland. Tests reveal she had high levels of the man-made chemical PHB in her system, which scientists say make her one of the most contaminated animals on the planet. Lulu was part of the UK's last pod of killer whales, which now numbers only eight. PHBs were used in most things from plastic to electrical goods and cement. Even though they were banned in the 1970s they are hard to break down and remain in landfill sites, which leach into the sea. Scientists think we'll see the impact of this toxic legacy for decades to come. More here: bbc.in-toxicwhale KillerWhale KillerWhales Orca Orcas Pollution Animals Wildlife Sea Environment Conservation Scotland BBCShorts BBCNews @bbcnews